#031F2D
Closest named color: Rich Black (#0D1B2A). oklch(22.6% 0.043 234), rgb(3, 31, 45).
Aa
White text reads best on this color (16.96:1).
About this color
#031F2D is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.043 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.016 away. White text reads best on it, at 16.96:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 16.96:1 |
Values
| HEX | #031F2D |
| RGB | rgb(3, 31, 45) |
| HSL | hsl(200, 88%, 9%) |
| OKLCH | oklch(22.6% 0.043 234) |
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 #031F2D | 16.96:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #031F2D | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #031F2D text on white | 16.96:1 | AAA | Lc 103.7 | Preferred for body text |
| #031F2D text on black | 1.23:1 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE9
oklch(88.6% 0.028 232.7)
-
Step 300
300
#A1C7DD
oklch(80.9% 0.051 233.6)
-
Step 400
400
#6BA9CC
oklch(70.6% 0.082 234.4)
-
Step 500
500
#3E93BF
oklch(63% 0.105 234.5)
-
Step 600
600
#0C7DAB
oklch(55.6% 0.113 233.9)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800
#055677
oklch(42.7% 0.087 233.7)
-
Step 900
900
#134760
oklch(37.7% 0.068 234)
-
Step 950
950 (this color)
#031F2D
oklch(22.6% 0.043 234)
#031F2D 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) | #181F2E | 0.027 |
| Deuteranopia (no green cones) | #121B2D | 0.021 |
| Tritanopia (no blue cones) | #002324 | 0.027 |
| Achromatopsia (no color) | #1C1C1C | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031F2D
#031F2D
oklch(22.6% 0.043 234)
- #2B1607
#2B1607
oklch(22.6% 0.042 54.7)
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 #031F2D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.016
- Dark #1B2431 ΔE 0.038
- Oxford Blue #1B263B ΔE 0.048
- Jet #212529 ΔE 0.049
- Rich Navy #001219 ΔE 0.059
- Navy Blue #001146 ΔE 0.069
- Almost Black #070D0D ΔE 0.082
- Space Cadet #2B2D42 ΔE 0.085
Use #031F2D 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.