#031E31
Closest named color: Rich Black (#0D1B2A). oklch(22.6% 0.049 242.9), rgb(3, 30, 49).
Aa
White text reads best on this color (17.01:1).
About this color
#031E31 is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.049 and its hue 243°. 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 17.01:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 17.01:1 |
Values
| HEX | #031E31 |
| RGB | rgb(3, 30, 49) |
| HSL | hsl(205, 88%, 10%) |
| OKLCH | oklch(22.6% 0.049 242.9) |
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 #031E31 | 17.01:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #031E31 | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #031E31 text on white | 17.01:1 | AAA | Lc 103.7 | Preferred for body text |
| #031E31 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C7DCED
oklch(88.4% 0.033 242.4)
-
Step 300
300
#A0C6E4
oklch(80.9% 0.059 242.2)
-
Step 400
400
#6BA8D7
oklch(70.9% 0.094 242.8)
-
Step 500
500
#3D91CC
oklch(63.2% 0.12 242.7)
-
Step 600
600
#0E7AB9
oklch(55.7% 0.13 242.9)
-
Step 700
700
#00669E
oklch(49% 0.119 243.2)
-
Step 800
800
#065481
oklch(42.8% 0.1 242.6)
-
Step 900
900
#134567
oklch(37.5% 0.078 243.1)
-
Step 950
950 (this color)
#031E31
oklch(22.6% 0.049 242.9)
#031E31 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) | #151F32 | 0.023 |
| Deuteranopia (no green cones) | #0E1A31 | 0.017 |
| Tritanopia (no blue cones) | #002325 | 0.034 |
| Achromatopsia (no color) | #1C1C1C | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031E31
#031E31
oklch(22.6% 0.049 242.9)
- #2C1601
#2C1601
oklch(22.6% 0.05 63)
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 #031E31, 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 0.040
- Oxford Blue #1B263B ΔE 0.047
- Jet #212529 ΔE 0.054
- Navy Blue #001146 ΔE 0.060
- Rich Navy #001219 ΔE 0.061
- Dark Navy #000435 ΔE 0.084
- Space Cadet #2B2D42 ΔE 0.084
Use #031E31 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.