#031C31
Closest named color: Rich Black (#0D1B2A). oklch(22% 0.052 246.9), rgb(3, 28, 49).
Aa
White text reads best on this color (17.29:1).
About this color
#031C31 is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.052 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.017 away. White text reads best on it, at 17.29:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.29:1 |
Values
| HEX | #031C31 |
| RGB | rgb(3, 28, 49) |
| HSL | hsl(207, 88%, 10%) |
| OKLCH | oklch(22% 0.052 246.9) |
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 #031C31 | 17.29:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #031C31 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #031C31 text on white | 17.29:1 | AAA | Lc 104.0 | Preferred for body text |
| #031C31 text on black | 1.21:1 | Fails | Lc 0.0 | 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 950.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C8DCEF
oklch(88.5% 0.034 246.8)
-
Step 300
300
#A1C5E7
oklch(80.9% 0.062 247.1)
-
Step 400
400
#6CA6DB
oklch(70.6% 0.099 247.2)
-
Step 500
500
#418FD1
oklch(63.1% 0.126 247)
-
Step 600
600
#1878BE
oklch(55.6% 0.136 246.9)
-
Step 700
700
#0565A4
oklch(49.2% 0.127 246.7)
-
Step 800
800
#0D5285
oklch(42.7% 0.106 247.2)
-
Step 900
900
#16446A
oklch(37.6% 0.082 247.3)
-
Step 950
950 (this color)
#031C31
oklch(22% 0.052 246.9)
#031C31 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) | #121D32 | 0.020 |
| Deuteranopia (no green cones) | #0B1931 | 0.013 |
| Tritanopia (no blue cones) | #002124 | 0.036 |
| Achromatopsia (no color) | #1B1B1B | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031C31
#031C31
oklch(22% 0.052 246.9)
- #291500
#291500
oklch(21.9% 0.048 66.7)
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 #031C31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.017
- Dark #1B2431 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.052
- Navy Blue #001146 ΔE 0.055
- Rich Navy #001219 ΔE 0.057
- Jet #212529 ΔE 0.060
- Dark Navy #000435 ΔE 0.077
- Night Blue #040348 ΔE 0.079
Use #031C31 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.