#677DD1
Closest named color: Soft Blue (#6488EA). oklch(61.1% 0.13 271.1), rgb(103, 125, 209).
Aa
Black text reads best on this color (5.43:1).
About this color
#677DD1 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.130 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.043 away. Black text reads best on it, at 5.43:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.130) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.43:1 |
| White text | 3.86:1 |
Values
| HEX | #677DD1 |
| RGB | rgb(103, 125, 209) |
| HSL | hsl(228, 54%, 61%) |
| OKLCH | oklch(61.1% 0.13 271.1) |
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 #677DD1 | 3.86:1 | AA large text | Lc -71.5 | Content text, not long reading |
| Black text on #677DD1 | 5.43:1 | AA | Lc 38.1 | Non-text elements, placeholder text |
| #677DD1 text on white | 3.86:1 | AA large text | Lc 66.0 | Content text, not long reading |
| #677DD1 text on black | 5.43:1 | AA | Lc -35.7 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D0D8F1
oklch(88.4% 0.035 271.5)
-
Step 300
300
#B1BFEB
oklch(80.9% 0.064 271.1)
-
Step 400
400
#899DE0
oklch(70.7% 0.101 270.9)
-
Step 500
500 (this color)
#677DD1
oklch(61.1% 0.13 271.1)
-
Step 600
600
#566BC5
oklch(55.6% 0.141 271.3)
-
Step 700
700
#4659AA
oklch(49.1% 0.131 271)
-
Step 800
800
#3A498A
oklch(42.7% 0.109 271.4)
-
Step 900
900
#313E6E
oklch(37.7% 0.084 270.5)
-
Step 950
950
#1D2441
oklch(26.9% 0.055 272)
#677DD1 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) | #5C86D4 | 0.025 |
| Deuteranopia (no green cones) | #507DCF | 0.027 |
| Tritanopia (no blue cones) | #398F9D | 0.116 |
| Achromatopsia (no color) | #828282 | 0.130 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677DD1
#677DD1
oklch(61.1% 0.13 271.1)
- #9F7F00
#9F7F00
oklch(61% 0.125 91)
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 #677DD1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.043
- Dark Sky Blue #448EE4 ΔE 0.054
- Cool Blue #4984B8 ΔE 0.058
- Faded Blue #658CBB ΔE 0.059
- Cornflower #6A79F7 ΔE 0.060
- Windows Blue #3778BF ΔE 0.061
- Steel Blue #4682B4 ΔE 0.063
- Off Blue #5684AE ΔE 0.066
Use #677DD1 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.