#04191E
Closest named color: Rich Black (#0D1B2A). oklch(19.9% 0.029 215.2), rgb(4, 25, 30).
Aa
White text reads best on this color (18.05:1).
About this color
#04191E is a very dark close to neutral grey. In OKLCH its lightness is 20%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.028 away. White text reads best on it, at 18.05:1.
| Hue family | Neutrals |
| Lightness | very dark (20%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.16:1 |
| White text | 18.05:1 |
Values
| HEX | #04191E |
| RGB | rgb(4, 25, 30) |
| HSL | hsl(192, 76%, 7%) |
| OKLCH | oklch(19.9% 0.029 215.2) |
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 #04191E | 18.05:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #04191E | 1.16:1 | Fails | Lc 0.0 | Not readable |
| #04191E text on white | 18.05:1 | AAA | Lc 104.7 | Preferred for body text |
| #04191E text on black | 1.16:1 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECEE
oklch(93.7% 0.01 212.5)
-
Step 200
200
#CCDDE1
oklch(88.6% 0.019 213.4)
-
Step 300
300
#A8C7CF
oklch(80.9% 0.035 215.1)
-
Step 400
400
#78AAB6
oklch(70.7% 0.056 214.3)
-
Step 500
500
#5395A4
oklch(63.2% 0.071 214.1)
-
Step 600
600
#347F90
oklch(55.7% 0.077 215.2)
-
Step 700
700
#266B7A
oklch(49.1% 0.071 214.8)
-
Step 800
800
#215763
oklch(42.6% 0.059 214.8)
-
Step 900
900
#214851
oklch(37.7% 0.047 214.8)
-
Step 950
950 (this color)
#04191E
oklch(19.9% 0.029 215.2)
#04191E 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) | #15181E | 0.025 |
| Deuteranopia (no green cones) | #12151E | 0.024 |
| Tritanopia (no blue cones) | #001B1B | 0.013 |
| Achromatopsia (no color) | #161616 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04191E
#04191E
oklch(19.9% 0.029 215.2)
- #21110C
#21110C
oklch(19.9% 0.029 38.1)
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 #04191E, 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 0.030
- Almost Black #070D0D ΔE 0.050
- Dark #1B2431 ΔE 0.063
- Jet #212529 ΔE 0.067
- Oxford Blue #1B263B ΔE 0.077
- Navy Blue #001146 ΔE 0.086
- Dark Navy #000435 ΔE 0.088
Use #04191E 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.