#031C19
Closest named color: Rich Black (#0D1B2A). oklch(20.6% 0.032 184.4), rgb(3, 28, 25).
Aa
White text reads best on this color (17.73:1).
About this color
#031C19 is a very dark, muted teal or cyan. In OKLCH its lightness is 21%, its chroma 0.032 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.039 away. White text reads best on it, at 17.73:1.
| Hue family | Teals and cyans |
| Lightness | very dark (21%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.73:1 |
Values
| HEX | #031C19 |
| RGB | rgb(3, 28, 25) |
| HSL | hsl(173, 81%, 6%) |
| OKLCH | oklch(20.6% 0.032 184.4) |
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 #031C19 | 17.73:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #031C19 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #031C19 text on white | 17.73:1 | AAA | Lc 104.4 | Preferred for body text |
| #031C19 text on black | 1.18:1 | 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
#E2ECEB
oklch(93.5% 0.011 189.8)
-
Step 200
200
#CBDEDB
oklch(88.6% 0.021 185.4)
-
Step 300
300
#A6C9C3
oklch(80.9% 0.038 183.8)
-
Step 400
400
#74ADA5
oklch(70.6% 0.061 184.9)
-
Step 500
500
#4C998F
oklch(63.1% 0.078 184.4)
-
Step 600
600
#298379
oklch(55.5% 0.085 184.5)
-
Step 700
700
#196F66
oklch(49.1% 0.079 184.5)
-
Step 800
800
#195B53
oklch(42.8% 0.066 183.5)
-
Step 900
900
#1D4A45
oklch(37.6% 0.05 185.5)
-
Step 950
950 (this color)
#031C19
oklch(20.6% 0.032 184.4)
#031C19 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) | #1A1A19 | 0.034 |
| Deuteranopia (no green cones) | #161719 | 0.032 |
| Tritanopia (no blue cones) | #001D1B | 0.005 |
| Achromatopsia (no color) | #181818 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031C19
#031C19
oklch(20.6% 0.032 184.4)
- #241115
#241115
oklch(20.7% 0.032 6.7)
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 #031C19, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.039
- Rich Navy #001219 ΔE 0.042
- Almost Black #070D0D ΔE 0.058
- Dark #1B2431 ΔE 0.064
- Jet #212529 ΔE 0.064
- Oxford Blue #1B263B ΔE 0.080
- Dark Forest Green #002D04 ΔE 0.081
- Very Dark Green #062E03 ΔE 0.085
Use #031C19 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.