#3C4056
Closest named color: Dark Grey Blue (#29465B). oklch(37.7% 0.038 276.4), rgb(60, 64, 86).
Aa
White text reads best on this color (10.19:1).
About this color
#3C4056 is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.038 and its hue 276°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.029 away. White text reads best on it, at 10.19:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.038) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.05:1 |
| White text | 10.19:1 |
Values
| HEX | #3C4056 |
| RGB | rgb(60, 64, 86) |
| HSL | hsl(231, 18%, 29%) |
| OKLCH | oklch(37.7% 0.038 276.4) |
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 #3C4056 | 10.19:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #3C4056 | 2.05:1 | Fails | Lc 10.3 | Not readable |
| #3C4056 text on white | 10.19:1 | AAA | Lc 93.7 | Preferred for body text |
| #3C4056 text on black | 2.05:1 | Fails | Lc -8.9 | Not readable |
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 900.
-
Step 50
50
#F5F5F8
oklch(97.1% 0.004 286.3)
-
Step 100
100
#E8E9EF
oklch(93.5% 0.008 278.6)
-
Step 200
200
#D6D8E4
oklch(88.4% 0.017 278.5)
-
Step 300
300
#BBBFD3
oklch(80.8% 0.028 276.7)
-
Step 400
400
#999FBE
oklch(70.8% 0.046 276.6)
-
Step 500
500
#8087AD
oklch(63.2% 0.058 276.5)
-
Step 600
600
#697099
oklch(55.5% 0.064 276.6)
-
Step 700
700
#585E82
oklch(49.1% 0.058 276.7)
-
Step 800
800
#484D6A
oklch(42.8% 0.049 276.6)
-
Step 900
900 (this color)
#3C4056
oklch(37.7% 0.038 276.4)
-
Step 950
950
#232632
oklch(27.1% 0.023 273.8)
#3C4056 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) | #3A4257 | 0.006 |
| Deuteranopia (no green cones) | #384055 | 0.007 |
| Tritanopia (no blue cones) | #354448 | 0.033 |
| Achromatopsia (no color) | #414141 | 0.038 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3C4056
#3C4056
oklch(37.7% 0.038 276.4)
- #47422A
#47422A
oklch(37.7% 0.038 97.8)
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 #3C4056, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.029
- Charcoal #264653 ΔE 0.035
- Charcoal Grey #3C4142 ΔE 0.036
- Onyx #343A40 ΔE 0.042
- Dark Blue Grey #1F3B4D ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.055
- Prussian Blue #1D3557 ΔE 0.060
- Gunmetal #293241 ΔE 0.063
Use #3C4056 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.