#04152A
Closest named color: Rich Black (#0D1B2A). oklch(19.4% 0.049 253.8), rgb(4, 21, 42).
Aa
White text reads best on this color (18.32:1).
About this color
#04152A is a very dark, muted blue. In OKLCH its lightness is 19%, its chroma 0.049 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.027 away. White text reads best on it, at 18.32:1.
| Hue family | Blues |
| Lightness | very dark (19%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.14:1 |
| White text | 18.32:1 |
Values
| HEX | #04152A |
| RGB | rgb(4, 21, 42) |
| HSL | hsl(213, 83%, 9%) |
| OKLCH | oklch(19.4% 0.049 253.8) |
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 #04152A | 18.32:1 | AAA | Lc -107.0 | Preferred for body text |
| Black text on #04152A | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #04152A text on white | 18.32:1 | AAA | Lc 104.8 | Preferred for body text |
| #04152A text on black | 1.14:1 | 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
#E2EBF5
oklch(93.6% 0.017 250.8)
-
Step 200
200
#CBDBEF
oklch(88.6% 0.033 254)
-
Step 300
300
#A7C3E6
oklch(80.8% 0.058 254.2)
-
Step 400
400
#78A4D9
oklch(70.8% 0.092 253.6)
-
Step 500
500
#548CCF
oklch(63.1% 0.118 253.9)
-
Step 600
600
#3775BC
oklch(55.6% 0.128 253.7)
-
Step 700
700
#2962A2
oklch(49.1% 0.119 253.6)
-
Step 800
800
#235084
oklch(42.7% 0.1 253.9)
-
Step 900
900
#224369
oklch(37.7% 0.076 253.3)
-
Step 950
950 (this color)
#04152A
oklch(19.4% 0.049 253.8)
#04152A 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) | #0B172B | 0.013 |
| Deuteranopia (no green cones) | #05132A | 0.007 |
| Tritanopia (no blue cones) | #001A1D | 0.037 |
| Achromatopsia (no color) | #151515 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04152A
#04152A
oklch(19.4% 0.049 253.8)
- #201100
#201100
oklch(19.4% 0.042 71.9)
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 #04152A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.027
- Rich Navy #001219 ΔE 0.037
- Navy Blue #001146 ΔE 0.057
- Dark Navy #000435 ΔE 0.059
- Almost Black #070D0D ΔE 0.061
- Dark Navy Blue #00022E ΔE 0.067
- Dark #1B2431 ΔE 0.067
- Midnight #03012D ΔE 0.068
Use #04152A 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.