#051D18
Closest named color: Rich Black (#0D1B2A). oklch(21% 0.032 177.3), rgb(5, 29, 24).
Aa
White text reads best on this color (17.56:1).
About this color
#051D18 is a very dark, muted teal or cyan. In OKLCH its lightness is 21%, its chroma 0.032 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.042 away. White text reads best on it, at 17.56:1.
| Hue family | Teals and cyans |
| Lightness | very dark (21%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.19:1 |
| White text | 17.56:1 |
Values
| HEX | #051D18 |
| RGB | rgb(5, 29, 24) |
| HSL | hsl(167, 71%, 7%) |
| OKLCH | oklch(21% 0.032 177.3) |
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 #051D18 | 17.56:1 | AAA | Lc -106.6 | Preferred for body text |
| Black text on #051D18 | 1.19:1 | Fails | Lc 0.0 | Not readable |
| #051D18 text on white | 17.56:1 | AAA | Lc 104.3 | Preferred for body text |
| #051D18 text on black | 1.19:1 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CBDED9
oklch(88.5% 0.021 178.3)
-
Step 300
300
#A8C9C0
oklch(80.9% 0.038 177)
-
Step 400
400
#77ADA0
oklch(70.6% 0.06 177.8)
-
Step 500
500
#509989
oklch(63.1% 0.078 177.6)
-
Step 600
600
#308373
oklch(55.5% 0.084 178)
-
Step 700
700
#216F60
oklch(49.1% 0.078 177.4)
-
Step 800
800
#1E5B4E
oklch(42.8% 0.066 176.3)
-
Step 900
900
#1F4A41
oklch(37.6% 0.051 177.8)
-
Step 950
950 (this color)
#051D18
oklch(21% 0.032 177.3)
#051D18 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) | #1C1B18 | 0.034 |
| Deuteranopia (no green cones) | #181818 | 0.032 |
| Tritanopia (no blue cones) | #001E1B | 0.007 |
| Achromatopsia (no color) | #191919 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #051D18
#051D18
oklch(21% 0.032 177.3)
- #241218
#241218
oklch(21% 0.031 358.7)
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 #051D18, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.042
- Rich Navy #001219 ΔE 0.047
- Jet #212529 ΔE 0.061
- Almost Black #070D0D ΔE 0.062
- Dark #1B2431 ΔE 0.062
- Dark Forest Green #002D04 ΔE 0.076
- Oxford Blue #1B263B ΔE 0.078
- Very Dark Green #062E03 ΔE 0.080
Use #051D18 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.