#2C4E51
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.9% 0.04 202.9), rgb(44, 78, 81).
Aa
White text reads best on this color (9.06:1).
About this color
#2C4E51 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.040 and its hue 203°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.006 away. White text reads best on it, at 9.06:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.040) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.31:1 |
| White text | 9.06:1 |
Values
| HEX | #2C4E51 |
| RGB | rgb(44, 78, 81) |
| HSL | hsl(185, 30%, 25%) |
| OKLCH | oklch(39.9% 0.04 202.9) |
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 #2C4E51 | 9.06:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #2C4E51 | 2.31:1 | Fails | Lc 13.2 | Not readable |
| #2C4E51 text on white | 9.06:1 | AAA | Lc 90.8 | Preferred for body text |
| #2C4E51 text on black | 2.31:1 | Fails | Lc -11.5 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E4ECEC
oklch(93.7% 0.009 197)
-
Step 200
200
#CDDDDE
oklch(88.6% 0.017 201.4)
-
Step 300
300
#ABC7C9
oklch(81% 0.03 201.9)
-
Step 400
400
#7DAAAE
oklch(70.7% 0.048 203)
-
Step 500
500
#5B959A
oklch(63.2% 0.061 202.8)
-
Step 600
600
#3E7F85
oklch(55.6% 0.067 203.4)
-
Step 700
700
#306B70
oklch(49.1% 0.062 202.8)
-
Step 800
800
#29575B
oklch(42.6% 0.051 202.9)
-
Step 900
900 (this color)
#2C4E51
oklch(39.9% 0.04 202.9)
-
Step 950
950
#172A2C
oklch(27% 0.025 204.3)
#2C4E51 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) | #494B51 | 0.040 |
| Deuteranopia (no green cones) | #434751 | 0.036 |
| Tritanopia (no blue cones) | #1B504F | 0.017 |
| Achromatopsia (no color) | #494949 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C4E51
#2C4E51
oklch(39.9% 0.04 202.9)
- #5B3F3D
#5B3F3D
oklch(39.9% 0.04 23.6)
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 #2C4E51, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.006
- Charcoal #264653 ΔE 0.030
- Dark Teal #014D4E ΔE 0.031
- Deep Teal #00555A ΔE 0.031
- Dark Grey Blue #29465B ΔE 0.036
- Dark Blue Green #005249 ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.044
- Petrol #005F6A ΔE 0.058
Use #2C4E51 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.