#05151F
Closest named color: Rich Navy (#001219). oklch(18.7% 0.03 237.3), rgb(5, 21, 31).
Aa
White text reads best on this color (18.52:1).
About this color
#05151F is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.030 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.020 away. White text reads best on it, at 18.52:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.13:1 |
| White text | 18.52:1 |
Values
| HEX | #05151F |
| RGB | rgb(5, 21, 31) |
| HSL | hsl(203, 72%, 7%) |
| OKLCH | oklch(18.7% 0.03 237.3) |
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 #05151F | 18.52:1 | AAA | Lc -107.1 | Preferred for body text |
| Black text on #05151F | 1.13:1 | Fails | Lc 0.0 | Not readable |
| #05151F text on white | 18.52:1 | AAA | Lc 105.0 | Preferred for body text |
| #05151F text on black | 1.13:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CDDBE5
oklch(88.4% 0.02 238.7)
-
Step 300
300
#ACC5D5
oklch(81% 0.035 236)
-
Step 400
400
#7FA7C1
oklch(70.8% 0.058 237.1)
-
Step 500
500
#5D90B1
oklch(63% 0.074 237.9)
-
Step 600
600
#427A9D
oklch(55.6% 0.08 238)
-
Step 700
700
#336786
oklch(49.2% 0.075 237.1)
-
Step 800
800
#2B546D
oklch(42.7% 0.062 237.4)
-
Step 900
900
#274558
oklch(37.6% 0.049 237.8)
-
Step 950
950 (this color)
#05151F
oklch(18.7% 0.03 237.3)
#05151F 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) | #10151F | 0.017 |
| Deuteranopia (no green cones) | #0D121F | 0.016 |
| Tritanopia (no blue cones) | #001818 | 0.023 |
| Achromatopsia (no color) | #131313 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05151F
#05151F
oklch(18.7% 0.03 237.3)
- #1D0F05
#1D0F05
oklch(18.5% 0.031 57.5)
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 #05151F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.020
- Rich Black #0D1B2A ΔE 0.032
- Almost Black #070D0D ΔE 0.042
- Dark #1B2431 ΔE 0.072
- Dark Navy #000435 ΔE 0.075
- Dark Navy Blue #00022E ΔE 0.078
- Jet #212529 ΔE 0.078
- Midnight #03012D ΔE 0.079
Use #05151F 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.