#031B18
Closest named color: Rich Navy (#001219). oklch(20.2% 0.032 184.1), rgb(3, 27, 24).
Aa
White text reads best on this color (17.89:1).
About this color
#031B18 is a very dark, muted teal or cyan. In OKLCH its lightness is 20%, its chroma 0.032 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.039 away. White text reads best on it, at 17.89:1.
| Hue family | Teals and cyans |
| Lightness | very dark (20%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.17:1 |
| White text | 17.89:1 |
Values
| HEX | #031B18 |
| RGB | rgb(3, 27, 24) |
| HSL | hsl(173, 80%, 6%) |
| OKLCH | oklch(20.2% 0.032 184.1) |
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 #031B18 | 17.89:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #031B18 | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #031B18 text on white | 17.89:1 | AAA | Lc 104.5 | Preferred for body text |
| #031B18 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
#F2F7F6
oklch(97.2% 0.005 183)
-
Step 100
100
#E2ECEA
oklch(93.5% 0.011 182.9)
-
Step 200
200
#CBDEDA
oklch(88.5% 0.021 181.8)
-
Step 300
300
#A7C9C3
oklch(80.9% 0.037 183.5)
-
Step 400
400
#75ADA5
oklch(70.6% 0.06 184.8)
-
Step 500
500
#4E998F
oklch(63.2% 0.077 184.2)
-
Step 600
600
#2C8379
oklch(55.6% 0.083 184.4)
-
Step 700
700
#1D6F66
oklch(49.2% 0.077 184.3)
-
Step 800
800
#1C5A53
oklch(42.6% 0.063 184.6)
-
Step 900
900
#1E4A45
oklch(37.7% 0.049 185.4)
-
Step 950
950 (this color)
#031B18
oklch(20.2% 0.032 184.1)
#031B18 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) | #191918 | 0.033 |
| Deuteranopia (no green cones) | #151618 | 0.031 |
| Tritanopia (no blue cones) | #001C1A | 0.005 |
| Achromatopsia (no color) | #171717 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031B18
#031B18
oklch(20.2% 0.032 184.1)
- #221015
#221015
oklch(20.1% 0.031 2.4)
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 #031B18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.039
- Rich Black #0D1B2A ΔE 0.041
- Almost Black #070D0D ΔE 0.054
- Dark #1B2431 ΔE 0.067
- Jet #212529 ΔE 0.067
- Oxford Blue #1B263B ΔE 0.083
- Dark Forest Green #002D04 ΔE 0.084
- Very Dark Green #062E03 ΔE 0.088
Use #031B18 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.