#031B15
Closest named color: Rich Navy (#001219). oklch(20% 0.034 174.3), rgb(3, 27, 21).
Aa
White text reads best on this color (17.92:1).
About this color
#031B15 is a very dark, muted teal or cyan. In OKLCH its lightness is 20%, its chroma 0.034 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Navy (#001219), ΔE 0.041 away. White text reads best on it, at 17.92:1.
| Hue family | Teals and cyans |
| Lightness | very dark (20%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Rich Navy (#001219) |
| Black text | 1.17:1 |
| White text | 17.92:1 |
Values
| HEX | #031B15 |
| RGB | rgb(3, 27, 21) |
| HSL | hsl(165, 80%, 6%) |
| OKLCH | oklch(20% 0.034 174.3) |
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 #031B15 | 17.92:1 | AAA | Lc -106.8 | Preferred for body text |
| Black text on #031B15 | 1.17:1 | Fails | Lc 0.0 | Not readable |
| #031B15 text on white | 17.92:1 | AAA | Lc 104.6 | Preferred for body text |
| #031B15 text on black | 1.17:1 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2ECE9
oklch(93.5% 0.011 176.3)
-
Step 200
200
#CBDED8
oklch(88.5% 0.022 174.9)
-
Step 300
300
#A7C9BF
oklch(80.8% 0.039 175.5)
-
Step 400
400
#76AE9E
oklch(70.7% 0.063 174.6)
-
Step 500
500
#4F9A86
oklch(63.2% 0.081 174.1)
-
Step 600
600
#2E8470
oklch(55.6% 0.088 174.6)
-
Step 700
700
#1F705D
oklch(49.2% 0.083 173.7)
-
Step 800
800
#1D5B4C
oklch(42.7% 0.068 173.9)
-
Step 900
900
#1F4B40
oklch(37.8% 0.053 174.6)
-
Step 950
950 (this color)
#031B15
oklch(20% 0.034 174.3)
#031B15 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) | #1A1915 | 0.035 |
| Deuteranopia (no green cones) | #161615 | 0.033 |
| Tritanopia (no blue cones) | #001B19 | 0.008 |
| Achromatopsia (no color) | #171717 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031B15
#031B15
oklch(20% 0.034 174.3)
- #220F17
#220F17
oklch(20% 0.035 354)
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 #031B15, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Navy #001219 ΔE 0.041
- Rich Black #0D1B2A ΔE 0.046
- Almost Black #070D0D ΔE 0.054
- Jet #212529 ΔE 0.070
- Dark #1B2431 ΔE 0.071
- Dark Forest Green #002D04 ΔE 0.081
- Very Dark Green #062E03 ΔE 0.085
- Oxford Blue #1B263B ΔE 0.087
Use #031B15 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.