#2B4841
Closest named color: Dark Slate Gray (#2F4F4F). oklch(37.6% 0.037 177.2), rgb(43, 72, 65).
Aa
White text reads best on this color (9.97:1).
About this color
#2B4841 is a dark, muted teal or cyan. In OKLCH its lightness is 38%, its chroma 0.037 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.029 away. White text reads best on it, at 9.97:1.
| Hue family | Teals and cyans |
| Lightness | dark (38%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.10:1 |
| White text | 9.97:1 |
Values
| HEX | #2B4841 |
| RGB | rgb(43, 72, 65) |
| HSL | hsl(166, 25%, 23%) |
| OKLCH | oklch(37.6% 0.037 177.2) |
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 #2B4841 | 9.97:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #2B4841 | 2.10:1 | Fails | Lc 10.9 | Not readable |
| #2B4841 text on white | 9.97:1 | AAA | Lc 93.1 | Preferred for body text |
| #2B4841 text on black | 2.10:1 | Fails | Lc -9.4 | 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 900.
-
Step 50
50
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E5ECEA
oklch(93.7% 0.008 177.3)
-
Step 200
200
#CFDDD9
oklch(88.6% 0.016 177)
-
Step 300
300
#AFC7C0
oklch(81% 0.028 176.2)
-
Step 400
400
#83AAA0
oklch(70.6% 0.045 177.5)
-
Step 500
500
#639589
oklch(63.1% 0.057 177.6)
-
Step 600
600
#497F73
oklch(55.5% 0.061 178)
-
Step 700
700
#3A6C60
oklch(49.2% 0.058 176.4)
-
Step 800
800
#30584E
oklch(42.8% 0.049 175.9)
-
Step 900
900 (this color)
#2B4841
oklch(37.6% 0.037 177.2)
-
Step 950
950
#1A2A26
oklch(26.9% 0.023 177.2)
#2B4841 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) | #464541 | 0.039 |
| Deuteranopia (no green cones) | #414142 | 0.038 |
| Tritanopia (no blue cones) | #224946 | 0.011 |
| Achromatopsia (no color) | #424242 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4841
#2B4841
oklch(37.6% 0.037 177.2)
- #523942
#523942
oklch(37.6% 0.038 355.7)
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 #2B4841, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.029
- Charcoal Grey #3C4142 ΔE 0.032
- Dark Teal #014D4E ΔE 0.032
- Charcoal #264653 ΔE 0.034
- Dark Blue Green #005249 ΔE 0.038
- Onyx #343A40 ΔE 0.047
- Dark Grey Blue #29465B ΔE 0.048
- Deep Teal #00555A ΔE 0.051
Use #2B4841 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.