#051B17
Closest named color: Rich Navy (#001219). oklch(20.3% 0.03 179.7), rgb(5, 27, 23).
Aa
White text reads best on this color (17.86:1).
About this color
#051B17 is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.030. It has too little chroma to lean warm or cool. The nearest named color is Rich Navy (#001219), ΔE 0.040 away. White text reads best on it, at 17.86:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.030) |
| Temperature | neutral |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.17:1 |
| White text | 17.86:1 |
Values
| HEX | #051B17 |
| RGB | rgb(5, 27, 23) |
| HSL | hsl(169, 69%, 6%) |
| OKLCH | oklch(20.3% 0.03 179.7) |
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 #051B17 | 17.86:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #051B17 | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #051B17 text on white | 17.86:1 | AAA | Lc 104.5 | Preferred for body text |
| #051B17 text on black | 1.17:1 | 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
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECEA
oklch(93.6% 0.01 181.4)
-
Step 200
200
#CCDED9
oklch(88.6% 0.02 177.4)
-
Step 300
300
#A9C8C1
oklch(80.8% 0.035 180.2)
-
Step 400
400
#7AADA2
oklch(70.8% 0.056 179.7)
-
Step 500
500
#55988B
oklch(63.1% 0.072 179.9)
-
Step 600
600
#368275
oklch(55.5% 0.078 180.3)
-
Step 700
700
#276E62
oklch(49% 0.073 180)
-
Step 800
800
#235A50
oklch(42.8% 0.06 179.4)
-
Step 900
900
#224A42
oklch(37.7% 0.048 178.9)
-
Step 950
950 (this color)
#051B17
oklch(20.3% 0.03 179.7)
#051B17 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) | #191917 | 0.031 |
| Deuteranopia (no green cones) | #161617 | 0.030 |
| Tritanopia (no blue cones) | #001C1A | 0.008 |
| Achromatopsia (no color) | #171717 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #051B17
#051B17
oklch(20.3% 0.03 179.7)
- #221116
#221116
oklch(20.4% 0.03 1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes and gradients that use #051B17
These curated palettes and gradients contain exactly #051B17. Open one to see the full color scheme around it.
Palettes
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.040
- Rich Black #0D1B2A ΔE 0.041
- Almost Black #070D0D ΔE 0.054
- Jet #212529 ΔE 0.066
- Dark #1B2431 ΔE 0.066
- Oxford Blue #1B263B ΔE 0.083
- Dark Forest Green #002D04 ΔE 0.083
- Very Dark Green #062E03 ΔE 0.087
Use #051B17 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.