#03151D
Closest named color: Rich Navy (#001219). oklch(18.4% 0.03 228), rgb(3, 21, 29).
Aa
White text reads best on this color (18.60:1).
About this color
#03151D is a very dark, muted teal or cyan. In OKLCH its lightness is 18%, its chroma 0.030 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.015 away. White text reads best on it, at 18.60:1.
| Hue family | Teals and cyans |
| Lightness | very dark (18%) |
| Chroma | muted (0.030) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.12:1 |
| White text | 18.60:1 |
Values
| HEX | #03151D |
| RGB | rgb(3, 21, 29) |
| HSL | hsl(198, 81%, 6%) |
| OKLCH | oklch(18.4% 0.03 228) |
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 #03151D | 18.60:1 | AAA | Lc -107.2 | Preferred for body text |
| Black text on #03151D | 1.12:1 | Fails | Lc 0.0 | Not readable |
| #03151D text on white | 18.60:1 | AAA | Lc 105.1 | Preferred for body text |
| #03151D text on black | 1.12:1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3EBEF
oklch(93.5% 0.01 228.9)
-
Step 200
200
#CCDCE4
oklch(88.5% 0.02 229.1)
-
Step 300
300
#AAC6D3
oklch(81% 0.035 227.5)
-
Step 400
400
#7BA8BD
oklch(70.7% 0.057 228.4)
-
Step 500
500
#5792AC
oklch(63% 0.073 228.1)
-
Step 600
600
#3A7C98
oklch(55.5% 0.08 228.5)
-
Step 700
700
#2C6982
oklch(49.2% 0.074 228.1)
-
Step 800
800
#265569
oklch(42.6% 0.061 228.5)
-
Step 900
900
#244756
oklch(37.8% 0.048 227.9)
-
Step 950
950 (this color)
#03151D
oklch(18.4% 0.03 228)
#03151D 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) | #11141D | 0.022 |
| Deuteranopia (no green cones) | #0D121D | 0.018 |
| Tritanopia (no blue cones) | #001718 | 0.016 |
| Achromatopsia (no color) | #131313 | 0.030 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #03151D
#03151D
oklch(18.4% 0.03 228)
- #1D0E07
#1D0E07
oklch(18.3% 0.029 46.4)
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 #03151D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.015
- Rich Black #0D1B2A ΔE 0.036
- Almost Black #070D0D ΔE 0.039
- Dark #1B2431 ΔE 0.075
- Dark Navy #000435 ΔE 0.077
- Dark Navy Blue #00022E ΔE 0.079
- Midnight #03012D ΔE 0.081
- Jet #212529 ΔE 0.081
Use #03151D 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.