#677ACA
Closest named color: Cool Blue (#4984B8). oklch(60% 0.124 272.1), rgb(103, 122, 202).
Aa
Black text reads best on this color (5.21:1).
About this color
#677ACA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.124 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.054 away. Black text reads best on it, at 5.21:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.21:1 |
| White text | 4.02:1 |
Values
| HEX | #677ACA |
| RGB | rgb(103, 122, 202) |
| HSL | hsl(228, 48%, 60%) |
| OKLCH | oklch(60% 0.124 272.1) |
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 #677ACA | 4.02:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #677ACA | 5.21:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #677ACA text on white | 4.02:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #677ACA text on black | 5.21:1 | AA | Lc -34.2 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5E9F6
oklch(93.5% 0.018 272.3)
-
Step 200
200
#D1D8F0
oklch(88.4% 0.034 272.8)
-
Step 300
300
#B3BFE9
oklch(81% 0.061 272.5)
-
Step 400
400
#8B9DDD
oklch(70.7% 0.096 271.7)
-
Step 500
500 (this color)
#677ACA
oklch(60% 0.124 272.1)
-
Step 600
600
#596BC1
oklch(55.5% 0.135 272.4)
-
Step 700
700
#4959A7
oklch(49.1% 0.126 272.3)
-
Step 800
800
#3C4987
oklch(42.6% 0.104 272.4)
-
Step 900
900
#333E6C
oklch(37.8% 0.08 271.9)
-
Step 950
950
#1E243F
oklch(26.9% 0.051 273)
#677ACA 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) | #5B83CD | 0.026 |
| Deuteranopia (no green cones) | #517BC8 | 0.026 |
| Tritanopia (no blue cones) | #3F8B98 | 0.111 |
| Achromatopsia (no color) | #7F7F7F | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #677ACA
#677ACA
oklch(60% 0.124 272.1)
- #9B7D00
#9B7D00
oklch(60.1% 0.123 91.9)
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 #677ACA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.054
- Soft Blue #6488EA ΔE 0.055
- Windows Blue #3778BF ΔE 0.056
- Steel Blue #4682B4 ΔE 0.058
- Faded Blue #658CBB ΔE 0.060
- Off Blue #5684AE ΔE 0.061
- Dark Sky Blue #448EE4 ΔE 0.064
- Dusty Blue #5A86AD ΔE 0.064
Use #677ACA 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.