#677BD8
Closest named color: Soft Blue (#6488EA). oklch(61.1% 0.142 272.4), rgb(103, 123, 216).
Aa
Black text reads best on this color (5.40:1).
About this color
#677BD8 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.142 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.039 away. Black text reads best on it, at 5.40:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.40:1 |
| White text | 3.88:1 |
Values
| HEX | #677BD8 |
| RGB | rgb(103, 123, 216) |
| HSL | hsl(229, 59%, 63%) |
| OKLCH | oklch(61.1% 0.142 272.4) |
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 #677BD8 | 3.88:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #677BD8 | 5.40:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #677BD8 text on white | 3.88:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #677BD8 text on black | 5.40:1 | AA | Lc -35.5 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D0D8F4
oklch(88.5% 0.04 272.9)
-
Step 300
300
#B1BEEE
oklch(80.8% 0.07 272.9)
-
Step 400
400
#899CE6
oklch(70.8% 0.111 272.3)
-
Step 500
500 (this color)
#677BD8
oklch(61.1% 0.142 272.4)
-
Step 600
600
#5669CD
oklch(55.7% 0.155 272.3)
-
Step 700
700
#4657B1
oklch(49.1% 0.144 272.1)
-
Step 800
800
#3A478F
oklch(42.6% 0.119 272.7)
-
Step 900
900
#313C72
oklch(37.6% 0.093 272.5)
-
Step 950
950
#1D2443
oklch(27.1% 0.058 272.4)
#677BD8 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) | #5486DC | 0.033 |
| Deuteranopia (no green cones) | #477DD6 | 0.035 |
| Tritanopia (no blue cones) | #328F9F | 0.127 |
| Achromatopsia (no color) | #818181 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677BD8
#677BD8
oklch(61.1% 0.142 272.4)
- #9E8000
#9E8000
oklch(61.1% 0.125 92.3)
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 #677BD8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.039
- Cornflower #6A79F7 ΔE 0.048
- Dark Sky Blue #448EE4 ΔE 0.056
- Medium Slate Blue #7B68EE ΔE 0.064
- Windows Blue #3778BF ΔE 0.066
- Medium Purple #9370DB ΔE 0.067
- Cool Blue #4984B8 ΔE 0.069
- Cornflower Blue #6495ED ΔE 0.070
Use #677BD8 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.