#234D4D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39% 0.047 195.4), rgb(35, 77, 77).
Aa
White text reads best on this color (9.37:1).
About this color
#234D4D is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.047 and its hue 195°. 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 9.37:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.047) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.24:1 |
| White text | 9.37:1 |
Values
| HEX | #234D4D |
| RGB | rgb(35, 77, 77) |
| HSL | hsl(180, 37%, 22%) |
| OKLCH | oklch(39% 0.047 195.4) |
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 #234D4D | 9.37:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #234D4D | 2.24:1 | Fails | Lc 12.4 | Not readable |
| #234D4D text on white | 9.37:1 | AAA | Lc 91.5 | Preferred for body text |
| #234D4D text on black | 2.24:1 | Fails | Lc -10.8 | 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
#E3ECEC
oklch(93.6% 0.01 197)
-
Step 200
200
#CBDDDD
oklch(88.4% 0.019 196.8)
-
Step 300
300
#A7C8C8
oklch(80.9% 0.035 196.5)
-
Step 400
400
#77ACAC
oklch(70.8% 0.056 196)
-
Step 500
500
#509797
oklch(63% 0.072 195.5)
-
Step 600
600
#2F8182
oklch(55.5% 0.078 196.3)
-
Step 700
700
#216D6E
oklch(49% 0.072 196.3)
-
Step 800
800
#1E5959
oklch(42.6% 0.06 195.1)
-
Step 900
900 (this color)
#234D4D
oklch(39% 0.047 195.4)
-
Step 950
950
#132B2B
oklch(27% 0.03 195.5)
#234D4D 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) | #484A4D | 0.048 |
| Deuteranopia (no green cones) | #41444D | 0.046 |
| Tritanopia (no blue cones) | #074F4D | 0.018 |
| Achromatopsia (no color) | #464646 | 0.047 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234D4D
#234D4D
oklch(39% 0.047 195.4)
- #5C3B3D
#5C3B3D
oklch(39.1% 0.047 15.5)
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 #234D4D, 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
- Dark Teal #014D4E ΔE 0.020
- Dark Blue Green #005249 ΔE 0.027
- Charcoal #264653 ΔE 0.029
- Deep Teal #00555A ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.039
- Charcoal Grey #3C4142 ΔE 0.045
- Onyx #343A40 ΔE 0.060
Use #234D4D 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.