#2B5258
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.2% 0.045 208.4), rgb(43, 82, 88).
Aa
White text reads best on this color (8.56:1).
About this color
#2B5258 is a dark, muted teal or cyan. In OKLCH its lightness is 41%, its chroma 0.045 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.015 away. White text reads best on it, at 8.56:1.
| Hue family | Teals and cyans |
| Lightness | dark (41%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.45:1 |
| White text | 8.56:1 |
Values
| HEX | #2B5258 |
| RGB | rgb(43, 82, 88) |
| HSL | hsl(188, 34%, 26%) |
| OKLCH | oklch(41.2% 0.045 208.4) |
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 #2B5258 | 8.56:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #2B5258 | 2.45:1 | Fails | Lc 14.6 | Not readable |
| #2B5258 text on white | 8.56:1 | AAA | Lc 89.4 | Fine for body text |
| #2B5258 text on black | 2.45:1 | Fails | Lc -12.9 | 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
#E4EBEC
oklch(93.5% 0.008 207.1)
-
Step 200
200
#CFDCDE
oklch(88.5% 0.014 207.9)
-
Step 300
300
#AEC6CA
oklch(81% 0.027 208.7)
-
Step 400
400
#82A8AF
oklch(70.6% 0.042 210.1)
-
Step 500
500
#62939B
oklch(63.1% 0.054 208.7)
-
Step 600
600
#477D85
oklch(55.5% 0.059 207.8)
-
Step 700
700
#386A71
oklch(49.2% 0.055 207.3)
-
Step 800
800 (this color)
#2B5258
oklch(41.2% 0.045 208.4)
-
Step 900
900
#2A474B
oklch(37.7% 0.035 206.9)
-
Step 950
950
#192A2C
oklch(27.1% 0.023 205.2)
#2B5258 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) | #4C4F58 | 0.044 |
| Deuteranopia (no green cones) | #454A58 | 0.040 |
| Tritanopia (no blue cones) | #135554 | 0.023 |
| Achromatopsia (no color) | #4C4C4C | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B5258
#2B5258
oklch(41.2% 0.045 208.4)
- #61423D
#61423D
oklch(41.2% 0.044 29.3)
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 #2B5258, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.015
- Deep Teal #00555A ΔE 0.025
- Dark Teal #014D4E ΔE 0.038
- Charcoal #264653 ΔE 0.040
- Dark Blue Green #005249 ΔE 0.040
- Dark Grey Blue #29465B ΔE 0.042
- Petrol #005F6A ΔE 0.045
- Dark Green Blue #1F6357 ΔE 0.056
Use #2B5258 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.