#18474D
Closest named color: Charcoal (#264653). oklch(36.9% 0.051 206.9), rgb(24, 71, 77).
Aa
White text reads best on this color (10.25:1).
About this color
#18474D is a dark, muted teal or cyan. In OKLCH its lightness is 37%, its chroma 0.051 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.019 away. White text reads best on it, at 10.25:1.
| Hue family | Teals and cyans |
| Lightness | dark (37%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 2.04:1 |
| White text | 10.25:1 |
Values
| HEX | #18474D |
| RGB | rgb(24, 71, 77) |
| HSL | hsl(187, 52%, 20%) |
| OKLCH | oklch(36.9% 0.051 206.9) |
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 #18474D | 10.25:1 | AAA | Lc -97.7 | Preferred for body text |
| Black text on #18474D | 2.04:1 | Fails | Lc 10.3 | Not readable |
| #18474D text on white | 10.25:1 | AAA | Lc 93.6 | Preferred for body text |
| #18474D text on black | 2.04:1 | Fails | Lc -8.9 | 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 900.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CADDE0
oklch(88.4% 0.021 208.1)
-
Step 300
300
#A5C8CD
oklch(80.9% 0.038 207)
-
Step 400
400
#72ACB4
oklch(70.7% 0.061 206.8)
-
Step 500
500
#4997A1
oklch(63.1% 0.078 206.5)
-
Step 600
600
#24818C
oklch(55.6% 0.085 206.7)
-
Step 700
700
#136D77
oklch(49.1% 0.079 206.6)
-
Step 800
800
#155961
oklch(42.7% 0.066 206.7)
-
Step 900
900 (this color)
#18474D
oklch(36.9% 0.051 206.9)
-
Step 950
950
#112B2E
oklch(27% 0.032 205.4)
#18474D 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) | #41444D | 0.050 |
| Deuteranopia (no green cones) | #393E4D | 0.046 |
| Tritanopia (no blue cones) | #004A49 | 0.018 |
| Achromatopsia (no color) | #414141 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18474D
#18474D
oklch(36.9% 0.051 206.9)
- #573531
#573531
oklch(36.9% 0.05 27)
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 #18474D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.019
- Dark Teal #014D4E ΔE 0.021
- Dark Grey Blue #29465B ΔE 0.032
- Dark Slate Gray #2F4F4F ΔE 0.038
- Dark Blue Grey #1F3B4D ΔE 0.040
- Dark Blue Green #005249 ΔE 0.040
- Charcoal Grey #3C4142 ΔE 0.044
- Midnight Green #073B4C ΔE 0.044
Use #18474D 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.