#04152D
Closest named color: Rich Black (#0D1B2A). oklch(19.7% 0.054 256.3), rgb(4, 21, 45).
Aa
White text reads best on this color (18.25:1).
About this color
#04152D is a very dark, muted blue. In OKLCH its lightness is 20%, its chroma 0.054 and its hue 256°. 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 18.25:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.15:1 |
| White text | 18.25:1 |
Values
| HEX | #04152D |
| RGB | rgb(4, 21, 45) |
| HSL | hsl(215, 84%, 10%) |
| OKLCH | oklch(19.7% 0.054 256.3) |
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 #04152D | 18.25:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #04152D | 1.15:1 | Fails | Lc 0.0 | Not readable |
| #04152D text on white | 18.25:1 | AAA | Lc 104.8 | Preferred for body text |
| #04152D 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
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CADBF1
oklch(88.6% 0.035 254.9)
-
Step 300
300
#A6C3EA
oklch(80.9% 0.064 255.9)
-
Step 400
400
#76A3E0
oklch(70.8% 0.102 256.2)
-
Step 500
500
#528BD7
oklch(63.2% 0.13 256.2)
-
Step 600
600
#3573C4
oklch(55.6% 0.141 256.2)
-
Step 700
700
#2760AA
oklch(49.1% 0.133 256.4)
-
Step 800
800
#224F89
oklch(42.8% 0.108 256)
-
Step 900
900
#21426E
oklch(37.8% 0.085 256.3)
-
Step 950
950 (this color)
#04152D
oklch(19.7% 0.054 256.3)
#04152D 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) | #09172E | 0.011 |
| Deuteranopia (no green cones) | #03132D | 0.008 |
| Tritanopia (no blue cones) | #001B1E | 0.043 |
| Achromatopsia (no color) | #151515 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04152D
#04152D
oklch(19.7% 0.054 256.3)
- #201200
#201200
oklch(19.7% 0.041 74.9)
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 #04152D, 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 0.043
- Navy Blue #001146 ΔE 0.051
- Dark Navy #000435 ΔE 0.056
- Dark Navy Blue #00022E ΔE 0.065
- Dark #1B2431 ΔE 0.066
- Midnight #03012D ΔE 0.067
- Very Dark Blue #000133 ΔE 0.067
Use #04152D 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.