#204D55
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.2% 0.051 210.8), rgb(32, 77, 85).
Aa
White text reads best on this color (9.31:1).
About this color
#204D55 is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.051 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.020 away. White text reads best on it, at 9.31:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.25:1 |
| White text | 9.31:1 |
Values
| HEX | #204D55 |
| RGB | rgb(32, 77, 85) |
| HSL | hsl(189, 45%, 23%) |
| OKLCH | oklch(39.2% 0.051 210.8) |
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 #204D55 | 9.31:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #204D55 | 2.25:1 | Fails | Lc 12.6 | Not readable |
| #204D55 text on white | 9.31:1 | AAA | Lc 91.3 | Preferred for body text |
| #204D55 text on black | 2.25:1 | Fails | Lc -11.0 | 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 900.
-
Step 50
50
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#CADDE1
oklch(88.5% 0.021 211.8)
-
Step 300
300
#A5C8CF
oklch(81% 0.039 211.1)
-
Step 400
400
#73ABB6
oklch(70.6% 0.061 211.2)
-
Step 500
500
#4A96A4
oklch(63% 0.078 211.1)
-
Step 600
600
#26808F
oklch(55.5% 0.085 211.1)
-
Step 700
700
#176C7A
oklch(49% 0.079 211.6)
-
Step 800
800
#175863
oklch(42.6% 0.065 211.3)
-
Step 900
900 (this color)
#204D55
oklch(39.2% 0.051 210.8)
-
Step 950
950
#122B2F
oklch(27.1% 0.032 209)
#204D55 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) | #464A55 | 0.047 |
| Deuteranopia (no green cones) | #3E4455 | 0.044 |
| Tritanopia (no blue cones) | #00514F | 0.026 |
| Achromatopsia (no color) | #474747 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #204D55
#204D55
oklch(39.2% 0.051 210.8)
- #5E3B35
#5E3B35
oklch(39.2% 0.051 30.2)
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 #204D55, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.020
- Charcoal #264653 ΔE 0.022
- Dark Teal #014D4E ΔE 0.023
- Deep Teal #00555A ΔE 0.027
- Dark Grey Blue #29465B ΔE 0.029
- Dark Blue Green #005249 ΔE 0.035
- Charcoal Grey #3C4142 ΔE 0.049
- Petrol #005F6A ΔE 0.058
Use #204D55 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.