#204243
Closest named color: Charcoal (#264653). oklch(35.4% 0.04 198), rgb(32, 66, 67).
Aa
White text reads best on this color (10.92:1).
About this color
#204243 is a dark, muted teal or cyan. In OKLCH its lightness is 35%, its chroma 0.040 and its hue 198°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal (#264653), ΔE 0.030 away. White text reads best on it, at 10.92:1.
| Hue family | Teals and cyans |
| Lightness | dark (35%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Charcoal (#264653) |
| Black text | 1.92:1 |
| White text | 10.92:1 |
Values
| HEX | #204243 |
| RGB | rgb(32, 66, 67) |
| HSL | hsl(182, 35%, 19%) |
| OKLCH | oklch(35.4% 0.04 198) |
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 #204243 | 10.92:1 | AAA | Lc -99.1 | Preferred for body text |
| Black text on #204243 | 1.92:1 | Fails | Lc 8.7 | Not readable |
| #204243 text on white | 10.92:1 | AAA | Lc 95.2 | Preferred for body text |
| #204243 text on black | 1.92:1 | Fails | Lc -7.5 | 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
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E4ECEC
oklch(93.7% 0.009 197)
-
Step 200
200
#CDDDDD
oklch(88.6% 0.017 196.8)
-
Step 300
300
#ABC7C7
oklch(80.9% 0.03 196.6)
-
Step 400
400
#7EAAAB
oklch(70.7% 0.047 197.9)
-
Step 500
500
#5B9597
oklch(63.1% 0.061 198.5)
-
Step 600
600
#3F7F81
oklch(55.5% 0.066 198.1)
-
Step 700
700
#306B6D
oklch(49% 0.061 198.3)
-
Step 800
800
#295859
oklch(42.8% 0.051 197.3)
-
Step 900
900 (this color)
#204243
oklch(35.4% 0.04 198)
-
Step 950
950
#172A2B
oklch(26.9% 0.025 200)
#204243 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) | #3E3F43 | 0.041 |
| Deuteranopia (no green cones) | #383B43 | 0.038 |
| Tritanopia (no blue cones) | #0D4442 | 0.016 |
| Achromatopsia (no color) | #3D3D3D | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #204243
#204243
oklch(35.4% 0.04 198)
- #4E3334
#4E3334
oklch(35.3% 0.039 16.8)
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 #204243, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal #264653 ΔE 0.030
- Onyx #343A40 ΔE 0.034
- Dark Blue Grey #1F3B4D ΔE 0.034
- Dark Teal #014D4E ΔE 0.037
- Charcoal Grey #3C4142 ΔE 0.037
- Midnight Green #073B4C ΔE 0.039
- Dark Grey Blue #29465B ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.049
Use #204243 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.