#677BE1
Closest named color: Soft Blue (#6488EA). oklch(61.6% 0.155 272.7), rgb(103, 123, 225).
Aa
Black text reads best on this color (5.49:1).
About this color
#677BE1 is a medium-dark, vivid blue. In OKLCH its lightness is 62%, its chroma 0.155 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.034 away. Black text reads best on it, at 5.49:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | vivid (0.155) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.49:1 |
| White text | 3.82:1 |
Values
| HEX | #677BE1 |
| RGB | rgb(103, 123, 225) |
| HSL | hsl(230, 67%, 64%) |
| OKLCH | oklch(61.6% 0.155 272.7) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #677BE1 | 3.82:1 | AA large text | Lc -71.0 | Content text, not long reading |
| Black text on #677BE1 | 5.49:1 | AA | Lc 38.6 | Non-text elements, placeholder text |
| #677BE1 text on white | 3.82:1 | AA large text | Lc 65.5 | Content text, not long reading |
| #677BE1 text on black | 5.49:1 | AA | Lc -36.2 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E5E9F9
oklch(93.6% 0.022 274.7)
-
Step 200
200
#CFD8F6
oklch(88.5% 0.042 272.3)
-
Step 300
300
#B0BEF2
oklch(80.9% 0.075 272.9)
-
Step 400
400
#879BEC
oklch(70.7% 0.121 272.4)
-
Step 500
500 (this color)
#677BE1
oklch(61.6% 0.155 272.7)
-
Step 600
600
#5566D4
oklch(55.5% 0.169 273)
-
Step 700
700
#4554B8
oklch(49% 0.158 272.8)
-
Step 800
800
#394695
oklch(42.8% 0.13 272.7)
-
Step 900
900
#303B76
oklch(37.5% 0.101 272.7)
-
Step 950
950
#1C2345
oklch(26.9% 0.064 272.7)
#677BE1 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4D88E5 | 0.040 |
| Deuteranopia (no green cones) | #3E7EDF | 0.042 |
| Tritanopia (no blue cones) | #2791A3 | 0.137 |
| Achromatopsia (no color) | #828282 | 0.155 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677BE1
#677BE1
oklch(61.6% 0.155 272.7)
- #9F8200
#9F8200
oklch(61.6% 0.126 93.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #677BE1, closest first.
No curated palette has a color within ΔE 0.04 of #677BE1.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.034
- Cornflower #6A79F7 ΔE 0.034
- Dark Sky Blue #448EE4 ΔE 0.055
- Medium Slate Blue #7B68EE ΔE 0.056
- Medium Purple #9370DB ΔE 0.066
- Cornflower Blue #6495ED ΔE 0.067
- Royal Blue #4169E1 ΔE 0.068
- Chefchaouen Blue #4895EF ΔE 0.069
Use #677BE1 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.