#234F52
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.8% 0.049 201.3), rgb(35, 79, 82).
Aa
White text reads best on this color (9.08:1).
About this color
#234F52 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.049 and its hue 201°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.013 away. White text reads best on it, at 9.08:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.049) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.31:1 |
| White text | 9.08:1 |
Values
| HEX | #234F52 |
| RGB | rgb(35, 79, 82) |
| HSL | hsl(184, 40%, 23%) |
| OKLCH | oklch(39.8% 0.049 201.3) |
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 #234F52 | 9.08:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #234F52 | 2.31:1 | Fails | Lc 13.2 | Not readable |
| #234F52 text on white | 9.08:1 | AAA | Lc 90.7 | Preferred for body text |
| #234F52 text on black | 2.31:1 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECED
oklch(93.6% 0.011 204.1)
-
Step 200
200
#CBDDDF
oklch(88.5% 0.019 204.8)
-
Step 300
300
#A6C8CA
oklch(80.9% 0.036 200.9)
-
Step 400
400
#74ACB0
oklch(70.7% 0.059 201.6)
-
Step 500
500
#4C979C
oklch(63.1% 0.075 201.2)
-
Step 600
600
#2A8187
oklch(55.5% 0.081 201.7)
-
Step 700
700
#1B6D72
oklch(49% 0.075 201.1)
-
Step 800
800
#1A595D
oklch(42.7% 0.062 201.2)
-
Step 900
900 (this color)
#234F52
oklch(39.8% 0.049 201.3)
-
Step 950
950
#122B2D
oklch(27% 0.031 202.3)
#234F52 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) | #4A4C52 | 0.050 |
| Deuteranopia (no green cones) | #424652 | 0.046 |
| Tritanopia (no blue cones) | #005250 | 0.022 |
| Achromatopsia (no color) | #484848 | 0.049 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #234F52
#234F52
oklch(39.8% 0.049 201.3)
- #5F3D3C
#5F3D3C
oklch(39.9% 0.048 21.3)
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 #234F52, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.013
- Dark Teal #014D4E ΔE 0.024
- Deep Teal #00555A ΔE 0.024
- Dark Blue Green #005249 ΔE 0.029
- Charcoal #264653 ΔE 0.030
- Dark Grey Blue #29465B ΔE 0.038
- Charcoal Grey #3C4142 ΔE 0.050
- Petrol #005F6A ΔE 0.055
Use #234F52 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.