#05152E
Closest named color: Rich Black (#0D1B2A). oklch(19.8% 0.055 258.2), rgb(5, 21, 46).
Aa
White text reads best on this color (18.21:1).
About this color
#05152E is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.055 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.028 away. White text reads best on it, at 18.21:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.21:1 |
Values
| HEX | #05152E |
| RGB | rgb(5, 21, 46) |
| HSL | hsl(217, 80%, 10%) |
| OKLCH | oklch(19.8% 0.055 258.2) |
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 #05152E | 18.21:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #05152E | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #05152E text on white | 18.21:1 | AAA | Lc 104.7 | Preferred for body text |
| #05152E text on black | 1.15:1 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF7
oklch(93.7% 0.019 255.5)
-
Step 200
200
#CBDAF2
oklch(88.5% 0.037 259.8)
-
Step 300
300
#A7C2EB
oklch(80.8% 0.065 258.6)
-
Step 400
400
#78A2E1
oklch(70.7% 0.104 258.3)
-
Step 500
500
#5489D9
oklch(63% 0.134 258.4)
-
Step 600
600
#3872C6
oklch(55.6% 0.144 257.9)
-
Step 700
700
#2B5FAC
oklch(49.2% 0.135 258.3)
-
Step 800
800
#244E8B
oklch(42.7% 0.112 258)
-
Step 900
900
#22416F
oklch(37.6% 0.087 258.2)
-
Step 950
950 (this color)
#05152E
oklch(19.8% 0.055 258.2)
#05152E 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) | #08172F | 0.009 |
| Deuteranopia (no green cones) | #03142D | 0.005 |
| Tritanopia (no blue cones) | #001B1F | 0.043 |
| Achromatopsia (no color) | #151515 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05152E
#05152E
oklch(19.8% 0.055 258.2)
- #201300
#201300
oklch(19.9% 0.042 78)
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 #05152E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.028
- Rich Navy #001219 ΔE 0.045
- Navy Blue #001146 ΔE 0.049
- Dark Navy #000435 ΔE 0.056
- Dark #1B2431 ΔE 0.066
- Dark Navy Blue #00022E ΔE 0.066
- Night Blue #040348 ΔE 0.066
- Very Dark Blue #000133 ΔE 0.067
Use #05152E 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.