#04192C
Closest named color: Rich Black (#0D1B2A). oklch(20.8% 0.047 248), rgb(4, 25, 44).
Aa
White text reads best on this color (17.78:1).
About this color
#04192C is a very dark, muted blue. In OKLCH its lightness is 21%, its chroma 0.047 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.015 away. White text reads best on it, at 17.78:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.18:1 |
| White text | 17.78:1 |
Values
| HEX | #04192C |
| RGB | rgb(4, 25, 44) |
| HSL | hsl(209, 83%, 9%) |
| OKLCH | oklch(20.8% 0.047 248) |
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 #04192C | 17.78:1 | AAA | Lc -106.7 | Preferred for body text |
| Black text on #04192C | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #04192C text on white | 17.78:1 | AAA | Lc 104.4 | Preferred for body text |
| #04192C text on black | 1.18:1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADBED
oklch(88.4% 0.031 249.7)
-
Step 300
300
#A5C4E3
oklch(80.8% 0.055 248.5)
-
Step 400
400
#73A6D6
oklch(70.8% 0.089 247.7)
-
Step 500
500
#4C8FCB
oklch(63.2% 0.114 247.7)
-
Step 600
600
#2C78B7
oklch(55.7% 0.123 247.5)
-
Step 700
700
#1E649E
oklch(49% 0.115 248.2)
-
Step 800
800
#1C5280
oklch(42.7% 0.095 248.1)
-
Step 900
900
#1D4467
oklch(37.6% 0.075 248.2)
-
Step 950
950 (this color)
#04192C
oklch(20.8% 0.047 248)
#04192C 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) | #101A2D | 0.017 |
| Deuteranopia (no green cones) | #0A162C | 0.012 |
| Tritanopia (no blue cones) | #001E20 | 0.035 |
| Achromatopsia (no color) | #181818 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04192C
#04192C
oklch(20.8% 0.047 248)
- #251300
#251300
oklch(20.7% 0.045 68.1)
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 #04192C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.015
- Rich Navy #001219 ΔE 0.045
- Dark #1B2431 ΔE 0.054
- Navy Blue #001146 ΔE 0.058
- Oxford Blue #1B263B ΔE 0.063
- Jet #212529 ΔE 0.066
- Almost Black #070D0D ΔE 0.069
- Dark Navy #000435 ΔE 0.071
Use #04192C 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.