#2B4740
Closest named color: Charcoal Grey (#3C4142). oklch(37.3% 0.036 176.7), rgb(43, 71, 64).
Aa
White text reads best on this color (10.10:1).
About this color
#2B4740 is a dark, muted teal or cyan. In OKLCH its lightness is 37%, its chroma 0.036 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.031 away. White text reads best on it, at 10.10:1.
| Hue family | Teals and cyans |
| Lightness | dark (37%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 2.07:1 |
| White text | 10.10:1 |
Values
| HEX | #2B4740 |
| RGB | rgb(43, 71, 64) |
| HSL | hsl(165, 25%, 22%) |
| OKLCH | oklch(37.3% 0.036 176.7) |
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 #2B4740 | 10.10:1 | AAA | Lc -97.5 | Preferred for body text |
| Black text on #2B4740 | 2.07:1 | Fails | Lc 10.5 | Not readable |
| #2B4740 text on white | 10.10:1 | AAA | Lc 93.4 | Preferred for body text |
| #2B4740 text on black | 2.07:1 | Fails | Lc -9.1 | 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
#84AAA0
oklch(70.7% 0.044 177.1)
-
Step 500
500
#659589
oklch(63.2% 0.055 177.1)
-
Step 600
600
#4A7F72
oklch(55.5% 0.061 176.5)
-
Step 700
700
#3B6B60
oklch(49% 0.056 177.4)
-
Step 800
800
#31574E
oklch(42.5% 0.046 177.1)
-
Step 900
900 (this color)
#2B4740
oklch(37.3% 0.036 176.7)
-
Step 950
950
#1A2A26
oklch(26.9% 0.023 177.2)
#2B4740 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) | #454440 | 0.038 |
| Deuteranopia (no green cones) | #404041 | 0.037 |
| Tritanopia (no blue cones) | #224845 | 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°).
- #2B4740
#2B4740
oklch(37.3% 0.036 176.7)
- #513941
#513941
oklch(37.4% 0.036 357.2)
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 #2B4740, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.031
- Dark Slate Gray #2F4F4F ΔE 0.032
- Dark Teal #014D4E ΔE 0.034
- Charcoal #264653 ΔE 0.034
- Dark Blue Green #005249 ΔE 0.040
- Onyx #343A40 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.048
- Evergreen #05472A ΔE 0.052
Use #2B4740 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.