#2B5451
Closest named color: Dark Slate Gray (#2F4F4F). oklch(41.5% 0.047 189.4), rgb(43, 84, 81).
Aa
White text reads best on this color (8.43:1).
About this color
#2B5451 is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.047 and its hue 189°. 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 8.43:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.48:1 |
| White text | 8.43:1 |
Values
| HEX | #2B5451 |
| RGB | rgb(43, 84, 81) |
| HSL | hsl(176, 32%, 25%) |
| OKLCH | oklch(41.5% 0.047 189.4) |
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 #2B5451 | 8.43:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #2B5451 | 2.48:1 | Fails | Lc 15.0 | Dividers and decoration only |
| #2B5451 text on white | 8.43:1 | AAA | Lc 89.0 | Fine for body text |
| #2B5451 text on black | 2.48:1 | Fails | Lc -13.3 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4ECEB
oklch(93.7% 0.009 188.1)
-
Step 200
200
#CFDCDB
oklch(88.4% 0.014 191.4)
-
Step 300
300
#AEC7C4
oklch(81% 0.027 187.9)
-
Step 400
400
#82AAA6
oklch(70.8% 0.044 188.6)
-
Step 500
500
#619590
oklch(63.2% 0.056 188.2)
-
Step 600
600
#467F7B
oklch(55.6% 0.061 189.7)
-
Step 700
700
#376B67
oklch(49.1% 0.056 189)
-
Step 800
800 (this color)
#2B5451
oklch(41.5% 0.047 189.4)
-
Step 900
900
#2A4846
oklch(37.8% 0.036 190.3)
-
Step 950
950
#192A29
oklch(27% 0.023 191.2)
#2B5451 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) | #505051 | 0.050 |
| Deuteranopia (no green cones) | #494B51 | 0.046 |
| Tritanopia (no blue cones) | #175653 | 0.016 |
| Achromatopsia (no color) | #4D4D4D | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B5451
#2B5451
oklch(41.5% 0.047 189.4)
- #624146
#624146
oklch(41.4% 0.047 9.3)
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 #2B5451, 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 0.027
- Dark Blue Green #005249 ΔE 0.033
- Dark Teal #014D4E ΔE 0.039
- Petrol #005F6A ΔE 0.046
- Dark Green Blue #1F6357 ΔE 0.047
- Charcoal #264653 ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.054
Use #2B5451 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.