#2A5159
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41% 0.046 212.4), rgb(42, 81, 89).
Aa
White text reads best on this color (8.67:1).
About this color
#2A5159 is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.046 and its hue 212°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.016 away. White text reads best on it, at 8.67:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.41:1 |
| White text | 8.67:1 |
Values
| HEX | #2A5159 |
| RGB | rgb(42, 81, 89) |
| HSL | hsl(190, 36%, 26%) |
| OKLCH | oklch(41% 0.046 212.4) |
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 #2A5159 | 8.67:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #2A5159 | 2.41:1 | Fails | Lc 14.3 | Not readable |
| #2A5159 text on white | 8.67:1 | AAA | Lc 89.7 | Fine for body text |
| #2A5159 text on black | 2.41:1 | Fails | Lc -12.6 | 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 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
#CFDCDF
oklch(88.6% 0.015 213.1)
-
Step 300
300
#AEC6CB
oklch(81% 0.027 211.6)
-
Step 400
400
#82A8B0
oklch(70.6% 0.043 212)
-
Step 500
500
#61939D
oklch(63.2% 0.056 211.5)
-
Step 600
600
#477D88
oklch(55.7% 0.06 212.2)
-
Step 700
700
#386973
oklch(49% 0.055 212.4)
-
Step 800
800 (this color)
#2A5159
oklch(41% 0.046 212.4)
-
Step 900
900
#2A474D
oklch(37.8% 0.036 212.2)
-
Step 950
950
#19292D
oklch(26.9% 0.023 215.1)
#2A5159 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) | #4B4F59 | 0.043 |
| Deuteranopia (no green cones) | #434959 | 0.039 |
| Tritanopia (no blue cones) | #0F5453 | 0.026 |
| Achromatopsia (no color) | #4B4B4B | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A5159
#2A5159
oklch(41% 0.046 212.4)
- #61413A
#61413A
oklch(41% 0.047 32.8)
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 #2A5159, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.016
- Deep Teal #00555A ΔE 0.026
- Charcoal #264653 ΔE 0.036
- Dark Teal #014D4E ΔE 0.037
- Dark Grey Blue #29465B ΔE 0.038
- Dark Blue Green #005249 ΔE 0.041
- Petrol #005F6A ΔE 0.046
- Charcoal Grey #3C4142 ΔE 0.055
Use #2A5159 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.