#031A18
Closest named color: Rich Navy (#001219). oklch(19.8% 0.03 187.4), rgb(3, 26, 24).
Aa
White text reads best on this color (18.02:1).
About this color
#031A18 is a very dark, muted teal or cyan. In OKLCH its lightness is 20%, its chroma 0.030 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.035 away. White text reads best on it, at 18.02:1.
| Hue family | Teals and cyans |
| Lightness | very dark (20%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.16:1 |
| White text | 18.02:1 |
Values
| HEX | #031A18 |
| RGB | rgb(3, 26, 24) |
| HSL | hsl(175, 79%, 6%) |
| OKLCH | oklch(19.8% 0.03 187.4) |
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 #031A18 | 18.02:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #031A18 | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #031A18 text on white | 18.02:1 | AAA | Lc 104.6 | Preferred for body text |
| #031A18 text on black | 1.16:1 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CBDEDB
oklch(88.6% 0.021 185.4)
-
Step 300
300
#A7C9C4
oklch(81% 0.037 185.6)
-
Step 400
400
#77ADA7
oklch(70.8% 0.058 187.3)
-
Step 500
500
#509891
oklch(63.1% 0.073 187.3)
-
Step 600
600
#2F827B
oklch(55.5% 0.08 187.3)
-
Step 700
700
#216E68
oklch(49.1% 0.074 187.6)
-
Step 800
800
#1E5A55
oklch(42.8% 0.062 187.4)
-
Step 900
900
#1F4A46
oklch(37.7% 0.048 187.2)
-
Step 950
950 (this color)
#031A18
oklch(19.8% 0.03 187.4)
#031A18 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) | #181818 | 0.032 |
| Deuteranopia (no green cones) | #141518 | 0.030 |
| Tritanopia (no blue cones) | #001B19 | 0.005 |
| Achromatopsia (no color) | #161616 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031A18
#031A18
oklch(19.8% 0.03 187.4)
- #211013
#211013
oklch(19.9% 0.029 8.6)
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 #031A18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.035
- Rich Black #0D1B2A ΔE 0.040
- Almost Black #070D0D ΔE 0.050
- Dark #1B2431 ΔE 0.068
- Jet #212529 ΔE 0.069
- Oxford Blue #1B263B ΔE 0.084
- Dark Forest Green #002D04 ΔE 0.088
- Very Dark Green #062E03 ΔE 0.092
Use #031A18 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.