#031D29
Closest named color: Rich Black (#0D1B2A). oklch(21.7% 0.04 231.4), rgb(3, 29, 41).
Aa
White text reads best on this color (17.33:1).
About this color
#031D29 is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.040 and its hue 231°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.014 away. White text reads best on it, at 17.33:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.33:1 |
Values
| HEX | #031D29 |
| RGB | rgb(3, 29, 41) |
| HSL | hsl(199, 86%, 9%) |
| OKLCH | oklch(21.7% 0.04 231.4) |
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 #031D29 | 17.33:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #031D29 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #031D29 text on white | 17.33:1 | AAA | Lc 104.0 | Preferred for body text |
| #031D29 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE8
oklch(88.6% 0.026 231.7)
-
Step 300
300
#A3C7DA
oklch(81% 0.047 231.1)
-
Step 400
400
#6FA9C7
oklch(70.6% 0.075 231.8)
-
Step 500
500
#4494B9
oklch(63.2% 0.096 231)
-
Step 600
600
#1B7DA5
oklch(55.5% 0.104 231.5)
-
Step 700
700
#086A8E
oklch(49.2% 0.097 231.2)
-
Step 800
800
#0F5673
oklch(42.6% 0.081 231.6)
-
Step 900
900
#17475D
oklch(37.6% 0.063 231.9)
-
Step 950
950 (this color)
#031D29
oklch(21.7% 0.04 231.4)
#031D29 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) | #171D2A | 0.027 |
| Deuteranopia (no green cones) | #121929 | 0.022 |
| Tritanopia (no blue cones) | #002021 | 0.023 |
| Achromatopsia (no color) | #1A1A1A | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031D29
#031D29
oklch(21.7% 0.04 231.4)
- #281408
#281408
oklch(21.6% 0.039 50.7)
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 #031D29, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.014
- Dark #1B2431 ΔE 0.045
- Rich Navy #001219 ΔE 0.049
- Jet #212529 ΔE 0.054
- Oxford Blue #1B263B ΔE 0.056
- Navy Blue #001146 ΔE 0.072
- Almost Black #070D0D ΔE 0.072
- Dark Navy #000435 ΔE 0.087
Use #031D29 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.