#204F56
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.8% 0.052 208.5), rgb(32, 79, 86).
Aa
White text reads best on this color (9.07:1).
About this color
#204F56 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.052 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.018 away. White text reads best on it, at 9.07:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.052) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.31:1 |
| White text | 9.07:1 |
Values
| HEX | #204F56 |
| RGB | rgb(32, 79, 86) |
| HSL | hsl(188, 46%, 23%) |
| OKLCH | oklch(39.8% 0.052 208.5) |
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 #204F56 | 9.07:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #204F56 | 2.31:1 | Fails | Lc 13.3 | Not readable |
| #204F56 text on white | 9.07:1 | AAA | Lc 90.7 | Preferred for body text |
| #204F56 text on black | 2.31:1 | Fails | Lc -11.6 | 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
#A4C8CE
oklch(80.9% 0.039 208.8)
-
Step 400
400
#71ACB5
oklch(70.7% 0.062 208)
-
Step 500
500
#4797A3
oklch(63.1% 0.08 208.4)
-
Step 600
600
#21818E
oklch(55.6% 0.087 208.5)
-
Step 700
700
#106D79
oklch(49.1% 0.081 208.7)
-
Step 800
800
#145962
oklch(42.7% 0.066 208)
-
Step 900
900 (this color)
#204F56
oklch(39.8% 0.052 208.5)
-
Step 950
950
#112B2F
oklch(27% 0.033 208.6)
#204F56 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) | #484C56 | 0.049 |
| Deuteranopia (no green cones) | #404656 | 0.045 |
| Tritanopia (no blue cones) | #005251 | 0.022 |
| Achromatopsia (no color) | #484848 | 0.052 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #204F56
#204F56
oklch(39.8% 0.052 208.5)
- #603C37
#603C37
oklch(39.7% 0.052 28.3)
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 #204F56, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.018
- Deep Teal #00555A ΔE 0.022
- Dark Teal #014D4E ΔE 0.025
- Charcoal #264653 ΔE 0.028
- Dark Blue Green #005249 ΔE 0.033
- Dark Grey Blue #29465B ΔE 0.034
- Petrol #005F6A ΔE 0.052
- Charcoal Grey #3C4142 ΔE 0.053
Use #204F56 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.