#031F2C
Closest named color: Rich Black (#0D1B2A). oklch(22.6% 0.042 232.1), rgb(3, 31, 44).
Aa
White text reads best on this color (16.98:1).
About this color
#031F2C is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.042 and its hue 232°. 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 16.98:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 16.98:1 |
Values
| HEX | #031F2C |
| RGB | rgb(3, 31, 44) |
| HSL | hsl(199, 87%, 9%) |
| OKLCH | oklch(22.6% 0.042 232.1) |
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 #031F2C | 16.98:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #031F2C | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #031F2C text on white | 16.98:1 | AAA | Lc 103.7 | Preferred for body text |
| #031F2C 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
#A1C7DC
oklch(80.9% 0.05 232.4)
-
Step 400
400
#6CAACA
oklch(70.8% 0.079 231.9)
-
Step 500
500
#3E94BC
oklch(63.1% 0.101 231.7)
-
Step 600
600
#0D7DA8
oklch(55.5% 0.11 232.1)
-
Step 700
700
#006A8F
oklch(49.2% 0.1 231.3)
-
Step 800
800
#065675
oklch(42.6% 0.085 232.2)
-
Step 900
900
#13475F
oklch(37.6% 0.067 232.9)
-
Step 950
950 (this color)
#031F2C
oklch(22.6% 0.042 232.1)
#031F2C 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) | #181F2D | 0.027 |
| Deuteranopia (no green cones) | #131B2C | 0.023 |
| Tritanopia (no blue cones) | #002323 | 0.027 |
| Achromatopsia (no color) | #1C1C1C | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031F2C
#031F2C
oklch(22.6% 0.042 232.1)
- #2B1608
#2B1608
oklch(22.6% 0.042 52.9)
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 #031F2C, 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 0.049
- Jet #212529 ΔE 0.049
- Rich Navy #001219 ΔE 0.058
- Navy Blue #001146 ΔE 0.071
- Almost Black #070D0D ΔE 0.081
- Space Cadet #2B2D42 ΔE 0.086
Use #031F2C 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.