#00151B
Closest named color: Rich Navy (#001219). oklch(18.1% 0.032 217.3), rgb(0, 21, 27).
Aa
White text reads best on this color (18.69:1).
About this color
#00151B is a very dark, muted teal or cyan. In OKLCH its lightness is 18%, its chroma 0.032 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.012 away. White text reads best on it, at 18.69:1.
| Hue family | Teals and cyans |
| Lightness | very dark (18%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.12:1 |
| White text | 18.69:1 |
Values
| HEX | #00151B |
| RGB | rgb(0, 21, 27) |
| HSL | hsl(193, 100%, 5%) |
| OKLCH | oklch(18.1% 0.032 217.3) |
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 #00151B | 18.69:1 | AAA | Lc -107.2 | Preferred for body text |
| Black text on #00151B | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #00151B text on white | 18.69:1 | AAA | Lc 105.1 | Preferred for body text |
| #00151B text on black | 1.12:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CADDE2
oklch(88.5% 0.022 215.3)
-
Step 300
300
#A6C7D1
oklch(80.9% 0.038 218.1)
-
Step 400
400
#74AABA
oklch(70.6% 0.061 218.3)
-
Step 500
500
#4C95A9
oklch(63.1% 0.079 218)
-
Step 600
600
#2A7F94
oklch(55.5% 0.085 217.7)
-
Step 700
700
#1B6B7E
oklch(49% 0.079 217.7)
-
Step 800
800
#1A5866
oklch(42.8% 0.065 216)
-
Step 900
900
#1D4853
oklch(37.6% 0.051 217.1)
-
Step 950
950 (this color)
#00151B
oklch(18.1% 0.032 217.3)
#00151B 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) | #11141B | 0.028 |
| Deuteranopia (no green cones) | #0D111B | 0.025 |
| Tritanopia (no blue cones) | #001717 | 0.013 |
| Achromatopsia (no color) | #121212 | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #00151B
#00151B
oklch(18.1% 0.032 217.3)
- #1E0C07
#1E0C07
oklch(18% 0.033 37.3)
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 #00151B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.012
- Almost Black #070D0D ΔE 0.037
- Rich Black #0D1B2A ΔE 0.042
- Dark Navy #000435 ΔE 0.080
- Dark #1B2431 ΔE 0.080
- Dark Navy Blue #00022E ΔE 0.081
- Midnight #03012D ΔE 0.083
- Jet #212529 ΔE 0.085
Use #00151B 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.