#2A555E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.3% 0.05 212.9), rgb(42, 85, 94).
Aa
White text reads best on this color (8.20:1).
About this color
#2A555E is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.050 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.026 away. White text reads best on it, at 8.20:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.050) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.55:1 |
| White text | 8.20:1 |
Values
| HEX | #2A555E |
| RGB | rgb(42, 85, 94) |
| HSL | hsl(190, 38%, 27%) |
| OKLCH | oklch(42.3% 0.05 212.9) |
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 #2A555E | 8.20:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #2A555E | 2.55:1 | Fails | Lc 15.8 | Dividers and decoration only |
| #2A555E text on white | 8.20:1 | AAA | Lc 88.2 | Fine for body text |
| #2A555E text on black | 2.55:1 | Fails | Lc -13.9 | 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 800.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBED
oklch(93.5% 0.008 216.6)
-
Step 200
200
#CEDCDF
oklch(88.5% 0.016 212)
-
Step 300
300
#ACC6CC
oklch(80.9% 0.029 213.2)
-
Step 400
400
#7FA9B2
oklch(70.7% 0.047 212.3)
-
Step 500
500
#5D939F
oklch(63% 0.06 213.3)
-
Step 600
600
#427D8A
oklch(55.5% 0.065 213.7)
-
Step 700
700
#336A75
oklch(49.2% 0.06 212.4)
-
Step 800
800 (this color)
#2A555E
oklch(42.3% 0.05 212.9)
-
Step 900
900
#28474E
oklch(37.7% 0.039 213.7)
-
Step 950
950
#182A2E
oklch(27.1% 0.025 213.2)
#2A555E 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) | #4E525F | 0.046 |
| Deuteranopia (no green cones) | #464C5E | 0.043 |
| Tritanopia (no blue cones) | #075958 | 0.028 |
| Achromatopsia (no color) | #4F4F4F | 0.050 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A555E
#2A555E
oklch(42.3% 0.05 212.9)
- #66443C
#66443C
oklch(42.3% 0.049 33.8)
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 #2A555E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.026
- Deep Teal #00555A ΔE 0.026
- Petrol #005F6A ΔE 0.035
- Dark Teal #014D4E ΔE 0.047
- Dark Blue Green #005249 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.048
- Charcoal #264653 ΔE 0.049
- Dark Green Blue #1F6357 ΔE 0.051
Use #2A555E 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.