#04101C
Closest named color: Rich Navy (#001219). oklch(16.8% 0.032 247.5), rgb(4, 16, 28).
Aa
White text reads best on this color (19.15:1).
About this color
#04101C is a very dark, muted blue. In OKLCH its lightness is 17%, its chroma 0.032 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.014 away. White text reads best on it, at 19.15:1.
| Hue family | Blues |
| Lightness | very dark (17%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.09:1 |
| White text | 19.15:1 |
Values
| HEX | #04101C |
| RGB | rgb(4, 16, 28) |
| HSL | hsl(210, 75%, 6%) |
| OKLCH | oklch(16.8% 0.032 247.5) |
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 #04101C | 19.15:1 | AAA | Lc -107.4 | Preferred for body text |
| Black text on #04101C | 1.09:1 | Fails | Lc 0.0 | Not readable |
| #04101C text on white | 19.15:1 | AAA | Lc 105.5 | Preferred for body text |
| #04101C text on black | 1.09:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CFDBE7
oklch(88.6% 0.021 248.1)
-
Step 300
300
#AEC3D8
oklch(80.8% 0.038 248.3)
-
Step 400
400
#83A5C5
oklch(70.8% 0.06 247.1)
-
Step 500
500
#638EB6
oklch(63.1% 0.077 247.3)
-
Step 600
600
#4977A2
oklch(55.5% 0.084 248)
-
Step 700
700
#3A648B
oklch(49% 0.079 248)
-
Step 800
800
#315270
oklch(42.7% 0.063 247.3)
-
Step 900
900
#2B445B
oklch(37.7% 0.05 247.3)
-
Step 950
950 (this color)
#04101C
oklch(16.8% 0.032 247.5)
#04101C 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) | #0B101D | 0.013 |
| Deuteranopia (no green cones) | #070E1C | 0.009 |
| Tritanopia (no blue cones) | #001314 | 0.025 |
| Achromatopsia (no color) | #0F0F0F | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04101C
#04101C
oklch(16.8% 0.032 247.5)
- #180C02
#180C02
oklch(16.8% 0.031 66.2)
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 #04101C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.014
- Almost Black #070D0D ΔE 0.031
- Rich Black #0D1B2A ΔE 0.050
- Dark Navy Blue #00022E ΔE 0.065
- Midnight #03012D ΔE 0.066
- Dark Navy #000435 ΔE 0.066
- Very Dark Blue #000133 ΔE 0.072
- Navy Blue #001146 ΔE 0.084
Use #04101C 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.