#2A5B66
Closest named color: Petrol (#005F6A). oklch(44.2% 0.056 214.4), rgb(42, 91, 102).
Aa
White text reads best on this color (7.53:1).
About this color
#2A5B66 is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.056 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Petrol (#005F6A), ΔE 0.022 away. White text reads best on it, at 7.53:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Petrol (#005F6A) |
| Black text | 2.78:1 |
| White text | 7.53:1 |
Values
| HEX | #2A5B66 |
| RGB | rgb(42, 91, 102) |
| HSL | hsl(191, 42%, 28%) |
| OKLCH | oklch(44.2% 0.056 214.4) |
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 #2A5B66 | 7.53:1 | AAA | Lc -90.8 | Preferred for body text |
| Black text on #2A5B66 | 2.78:1 | Fails | Lc 18.0 | Dividers and decoration only |
| #2A5B66 text on white | 7.53:1 | AAA | Lc 86.0 | Fine for body text |
| #2A5B66 text on black | 2.78:1 | Fails | Lc -16.0 | Dividers and decoration only |
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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECEE
oklch(93.7% 0.01 212.5)
-
Step 200
200
#CCDCE0
oklch(88.4% 0.018 214.4)
-
Step 300
300
#AAC6CE
oklch(80.8% 0.032 216.9)
-
Step 400
400
#7BA9B5
oklch(70.6% 0.052 215.7)
-
Step 500
500
#5794A2
oklch(63.1% 0.067 214.1)
-
Step 600
600
#3A7E8D
oklch(55.5% 0.072 214.2)
-
Step 700
700
#2C6A78
oklch(49% 0.067 214.9)
-
Step 800
800 (this color)
#2A5B66
oklch(44.2% 0.056 214.4)
-
Step 900
900
#244850
oklch(37.8% 0.044 213.8)
-
Step 950
950
#162A2F
oklch(27% 0.027 215.5)
#2A5B66 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) | #535867 | 0.051 |
| Deuteranopia (no green cones) | #4A5166 | 0.047 |
| Tritanopia (no blue cones) | #005F5E | 0.031 |
| Achromatopsia (no color) | #545454 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A5B66
#2A5B66
oklch(44.2% 0.056 214.4)
- #6E483E
#6E483E
oklch(44.2% 0.055 35.4)
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 #2A5B66, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Petrol #005F6A ΔE 0.022
- Deep Teal #00555A ΔE 0.038
- YInMn Blue #415A77 ΔE 0.041
- Dark Green Blue #1F6357 ΔE 0.042
- Dark Aqua #05696B ΔE 0.044
- Dark Slate Gray #2F4F4F ΔE 0.045
- Light Navy Blue #2E5A88 ΔE 0.059
- Slate #516572 ΔE 0.061
Use #2A5B66 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.