#031B1E
Closest named color: Rich Black (#0D1B2A). oklch(20.5% 0.031 206.1), rgb(3, 27, 30).
Aa
White text reads best on this color (17.80:1).
About this color
#031B1E is a very dark, muted teal or cyan. In OKLCH its lightness is 20%, its chroma 0.031 and its hue 206°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.029 away. White text reads best on it, at 17.80:1.
| Hue family | Teals and cyans |
| Lightness | very dark (20%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.17:1 |
| White text | 17.80:1 |
Values
| HEX | #031B1E |
| RGB | rgb(3, 27, 30) |
| HSL | hsl(187, 82%, 6%) |
| OKLCH | oklch(20.5% 0.031 206.1) |
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 #031B1E | 17.80:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #031B1E | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #031B1E text on white | 17.80:1 | AAA | Lc 104.5 | Preferred for body text |
| #031B1E text on black | 1.17:1 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CADDE0
oklch(88.4% 0.021 208.1)
-
Step 300
300
#A6C8CC
oklch(80.9% 0.037 205.2)
-
Step 400
400
#74ABB3
oklch(70.6% 0.059 207.4)
-
Step 500
500
#4C97A0
oklch(63.2% 0.075 205.7)
-
Step 600
600
#2A818B
oklch(55.7% 0.082 206.1)
-
Step 700
700
#1B6D76
oklch(49.2% 0.076 206)
-
Step 800
800
#1A5960
oklch(42.8% 0.063 205.7)
-
Step 900
900
#1D494E
oklch(37.7% 0.049 205.4)
-
Step 950
950 (this color)
#031B1E
oklch(20.5% 0.031 206.1)
#031B1E 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) | #18191E | 0.031 |
| Deuteranopia (no green cones) | #14161E | 0.029 |
| Tritanopia (no blue cones) | #001D1C | 0.010 |
| Achromatopsia (no color) | #181818 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031B1E
#031B1E
oklch(20.5% 0.031 206.1)
- #24110F
#24110F
oklch(20.5% 0.032 26.7)
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 #031B1E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.029
- Rich Navy #001219 ΔE 0.037
- Almost Black #070D0D ΔE 0.056
- Dark #1B2431 ΔE 0.059
- Jet #212529 ΔE 0.063
- Oxford Blue #1B263B ΔE 0.074
- Navy Blue #001146 ΔE 0.089
- Dark Forest Green #002D04 ΔE 0.091
Use #031B1E 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.