#677BD5
Closest named color: Soft Blue (#6488EA). oklch(60.9% 0.138 272.3), rgb(103, 123, 213).
Aa
Black text reads best on this color (5.37:1).
About this color
#677BD5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.138 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.042 away. Black text reads best on it, at 5.37:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.138) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.37:1 |
| White text | 3.91:1 |
Values
| HEX | #677BD5 |
| RGB | rgb(103, 123, 213) |
| HSL | hsl(229, 57%, 62%) |
| OKLCH | oklch(60.9% 0.138 272.3) |
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 #677BD5 | 3.91:1 | AA large text | Lc -71.9 | Content text, not long reading |
| Black text on #677BD5 | 5.37:1 | AA | Lc 37.7 | Non-text elements, placeholder text |
| #677BD5 text on white | 3.91:1 | AA large text | Lc 66.4 | Content text, not long reading |
| #677BD5 text on black | 5.37:1 | AA | Lc -35.3 | 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
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D0D8F3
oklch(88.5% 0.038 272.5)
-
Step 300
300
#B1BFED
oklch(81% 0.067 271.6)
-
Step 400
400
#899CE4
oklch(70.7% 0.108 272.1)
-
Step 500
500 (this color)
#677BD5
oklch(60.9% 0.138 272.3)
-
Step 600
600
#5669CA
oklch(55.5% 0.151 272.3)
-
Step 700
700
#4757AF
oklch(49.1% 0.14 272.5)
-
Step 800
800
#3A488D
oklch(42.7% 0.115 272.1)
-
Step 900
900
#323D71
oklch(37.8% 0.09 272.4)
-
Step 950
950
#1D2442
oklch(27% 0.057 272.2)
#677BD5 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) | #5686D8 | 0.032 |
| Deuteranopia (no green cones) | #4A7CD3 | 0.033 |
| Tritanopia (no blue cones) | #358E9E | 0.122 |
| Achromatopsia (no color) | #818181 | 0.138 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677BD5
#677BD5
oklch(60.9% 0.138 272.3)
- #9D8000
#9D8000
oklch(60.9% 0.125 92.9)
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 #677BD5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.042
- Cornflower #6A79F7 ΔE 0.053
- Dark Sky Blue #448EE4 ΔE 0.057
- Windows Blue #3778BF ΔE 0.064
- Cool Blue #4984B8 ΔE 0.065
- Medium Slate Blue #7B68EE ΔE 0.067
- Medium Purple #9370DB ΔE 0.068
- Faded Blue #658CBB ΔE 0.068
Use #677BD5 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.