#05151B
Closest named color: Rich Navy (#001219). oklch(18.5% 0.026 224), rgb(5, 21, 27).
Aa
White text reads best on this color (18.59:1).
About this color
#05151B is a very dark close to neutral grey. In OKLCH its lightness is 18%, its chroma 0.026. It has too little chroma to lean warm or cool. The nearest named color is Rich Navy (#001219), ΔE 0.017 away. White text reads best on it, at 18.59:1.
| Hue family | Neutrals |
| Lightness | very dark (18%) |
| Chroma | close to neutral grey (0.026) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.12:1 |
| White text | 18.59:1 |
Values
| HEX | #05151B |
| RGB | rgb(5, 21, 27) |
| HSL | hsl(196, 69%, 6%) |
| OKLCH | oklch(18.5% 0.026 224) |
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 #05151B | 18.59:1 | AAA | Lc -107.2 | Preferred for body text |
| Black text on #05151B | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #05151B text on white | 18.59:1 | AAA | Lc 105.1 | Preferred for body text |
| #05151B 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CEDCE1
oklch(88.5% 0.017 221.1)
-
Step 300
300
#ADC5CF
oklch(80.9% 0.03 224.8)
-
Step 400
400
#80A8B7
oklch(70.8% 0.049 222.9)
-
Step 500
500
#5F92A5
oklch(63.1% 0.061 223.5)
-
Step 600
600
#447C91
oklch(55.6% 0.067 224.5)
-
Step 700
700
#35687B
oklch(49% 0.063 224.7)
-
Step 800
800
#2C5564
oklch(42.6% 0.052 224)
-
Step 900
900
#284652
oklch(37.6% 0.041 225.6)
-
Step 950
950 (this color)
#05151B
oklch(18.5% 0.026 224)
#05151B 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) | #12141B | 0.021 |
| Deuteranopia (no green cones) | #0E121B | 0.017 |
| Tritanopia (no blue cones) | #001717 | 0.016 |
| Achromatopsia (no color) | #131313 | 0.026 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05151B
#05151B
oklch(18.5% 0.026 224)
- #1C0F09
#1C0F09
oklch(18.5% 0.025 45.6)
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 #05151B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.017
- Almost Black #070D0D ΔE 0.037
- Rich Black #0D1B2A ΔE 0.037
- Dark #1B2431 ΔE 0.075
- Jet #212529 ΔE 0.079
- Dark Navy #000435 ΔE 0.082
- Dark Navy Blue #00022E ΔE 0.083
- Midnight #03012D ΔE 0.084
Use #05151B 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.