#031C2C
Closest named color: Rich Black (#0D1B2A). oklch(21.6% 0.044 239.9), rgb(3, 28, 44).
Aa
White text reads best on this color (17.40:1).
About this color
#031C2C is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.044 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.012 away. White text reads best on it, at 17.40:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.40:1 |
Values
| HEX | #031C2C |
| RGB | rgb(3, 28, 44) |
| HSL | hsl(203, 87%, 9%) |
| OKLCH | oklch(21.6% 0.044 239.9) |
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 #031C2C | 17.40:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #031C2C | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #031C2C text on white | 17.40:1 | AAA | Lc 104.1 | Preferred for body text |
| #031C2C text on black | 1.20:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF3
oklch(93.5% 0.015 241.8)
-
Step 200
200
#C9DCEB
oklch(88.5% 0.029 241.6)
-
Step 300
300
#A3C6E0
oklch(81% 0.053 240.5)
-
Step 400
400
#6EA8D0
oklch(70.7% 0.084 239.7)
-
Step 500
500
#4491C4
oklch(63% 0.108 240.5)
-
Step 600
600
#1D7BB0
oklch(55.6% 0.116 239.7)
-
Step 700
700
#0B6798
oklch(49.1% 0.109 240.4)
-
Step 800
800
#10547B
oklch(42.6% 0.091 240.3)
-
Step 900
900
#184663
oklch(37.7% 0.07 240.2)
-
Step 950
950 (this color)
#031C2C
oklch(21.6% 0.044 239.9)
#031C2C 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) | #141C2D | 0.022 |
| Deuteranopia (no green cones) | #0F182C | 0.019 |
| Tritanopia (no blue cones) | #002022 | 0.029 |
| Achromatopsia (no color) | #1A1A1A | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031C2C
#031C2C
oklch(21.6% 0.044 239.9)
- #281403
#281403
oklch(21.5% 0.044 60.3)
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 #031C2C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.012
- Dark #1B2431 ΔE 0.046
- Rich Navy #001219 ΔE 0.050
- Oxford Blue #1B263B ΔE 0.056
- Jet #212529 ΔE 0.058
- Navy Blue #001146 ΔE 0.064
- Almost Black #070D0D ΔE 0.074
- Dark Navy #000435 ΔE 0.081
Use #031C2C 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.