#2B4F4B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.9% 0.042 186.5), rgb(43, 79, 75).
Aa
White text reads best on this color (9.04:1).
About this color
#2B4F4B is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.042 and its hue 187°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.009 away. White text reads best on it, at 9.04:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.32:1 |
| White text | 9.04:1 |
Values
| HEX | #2B4F4B |
| RGB | rgb(43, 79, 75) |
| HSL | hsl(173, 30%, 24%) |
| OKLCH | oklch(39.9% 0.042 186.5) |
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 #2B4F4B | 9.04:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #2B4F4B | 2.32:1 | Fails | Lc 13.3 | Not readable |
| #2B4F4B text on white | 9.04:1 | AAA | Lc 90.7 | Preferred for body text |
| #2B4F4B text on black | 2.32:1 | Fails | Lc -11.6 | 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 900.
-
Step 50
50
#F2F6F6
oklch(97% 0.004 197.1)
-
Step 100
100
#E3ECEB
oklch(93.6% 0.01 189.1)
-
Step 200
200
#CDDDDB
oklch(88.5% 0.017 187.8)
-
Step 300
300
#ABC8C4
oklch(81% 0.032 186.4)
-
Step 400
400
#7CABA5
oklch(70.6% 0.051 186.3)
-
Step 500
500
#599690
oklch(63% 0.064 187.6)
-
Step 600
600
#3C817A
oklch(55.7% 0.071 186.6)
-
Step 700
700
#2D6D67
oklch(49.2% 0.066 186.9)
-
Step 800
800
#275954
oklch(42.8% 0.055 186.7)
-
Step 900
900 (this color)
#2B4F4B
oklch(39.9% 0.042 186.5)
-
Step 950
950
#162B28
oklch(27% 0.028 184.2)
#2B4F4B 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) | #4C4B4B | 0.046 |
| Deuteranopia (no green cones) | #45474B | 0.041 |
| Tritanopia (no blue cones) | #1C514E | 0.014 |
| Achromatopsia (no color) | #494949 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4F4B
#2B4F4B
oklch(39.9% 0.042 186.5)
- #5C3E44
#5C3E44
oklch(40% 0.043 6)
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 #2B4F4B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.009
- Dark Blue Green #005249 ΔE 0.029
- Dark Teal #014D4E ΔE 0.030
- Deep Teal #00555A ΔE 0.032
- Charcoal #264653 ΔE 0.038
- Charcoal Grey #3C4142 ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.047
- Petrol #005F6A ΔE 0.061
Use #2B4F4B 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.