#18312B
Closest named color: Jet (#212529). oklch(29.1% 0.033 176.6), rgb(24, 49, 43).
Aa
White text reads best on this color (13.87:1).
About this color
#18312B is a dark, muted teal or cyan. In OKLCH its lightness is 29%, its chroma 0.033 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Jet (#212529), ΔE 0.043 away. White text reads best on it, at 13.87:1.
| Hue family | Teals and cyans |
| Lightness | dark (29%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Jet (#212529) |
| Black text | 1.51:1 |
| White text | 13.87:1 |
Values
| HEX | #18312B |
| RGB | rgb(24, 49, 43) |
| HSL | hsl(166, 34%, 14%) |
| OKLCH | oklch(29.1% 0.033 176.6) |
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 #18312B | 13.87:1 | AAA | Lc -103.5 | Preferred for body text |
| Black text on #18312B | 1.51:1 | Fails | Lc 0.0 | Not readable |
| #18312B text on white | 13.87:1 | AAA | Lc 100.4 | Preferred for body text |
| #18312B text on black | 1.51:1 | 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
#CBDED9
oklch(88.5% 0.021 178.3)
-
Step 300
300
#A7C9C0
oklch(80.8% 0.038 177.5)
-
Step 400
400
#75AE9F
oklch(70.7% 0.064 176.1)
-
Step 500
500
#4E9A88
oklch(63.2% 0.081 176.2)
-
Step 600
600
#2C8472
oklch(55.6% 0.088 176.7)
-
Step 700
700
#1D705F
oklch(49.2% 0.082 175.8)
-
Step 800
800
#1B5B4E
oklch(42.7% 0.068 176.7)
-
Step 900
900
#1E4B41
oklch(37.8% 0.053 176.6)
-
Step 950
950 (this color)
#18312B
oklch(29.1% 0.033 176.6)
#18312B 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) | #2F2E2B | 0.035 |
| Deuteranopia (no green cones) | #2B2B2B | 0.033 |
| Tritanopia (no blue cones) | #0F322F | 0.010 |
| Achromatopsia (no color) | #2C2C2C | 0.033 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18312B
#18312B
oklch(29.1% 0.033 176.6)
- #39252C
#39252C
oklch(29.2% 0.032 356.6)
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 #18312B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Jet #212529 ΔE 0.043
- Pakistan Green #283618 ΔE 0.044
- Gunmetal #293241 ΔE 0.049
- Dark #1B2431 ΔE 0.052
- Oxford Blue #1B263B ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.058
- Midnight Green #073B4C ΔE 0.059
- Onyx #343A40 ΔE 0.063
Use #18312B 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.