#274D42
Closest named color: Dark Slate Gray (#2F4F4F). oklch(38.8% 0.048 172.9), rgb(39, 77, 66).
Aa
White text reads best on this color (9.43:1).
About this color
#274D42 is a dark, muted teal or cyan. In OKLCH its lightness is 39%, its chroma 0.048 and its hue 173°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.025 away. White text reads best on it, at 9.43:1.
| Hue family | Teals and cyans |
| Lightness | dark (39%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.22:1 |
| White text | 9.43:1 |
Values
| HEX | #274D42 |
| RGB | rgb(39, 77, 66) |
| HSL | hsl(163, 33%, 23%) |
| OKLCH | oklch(38.8% 0.048 172.9) |
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 #274D42 | 9.43:1 | AAA | Lc -96.0 | Preferred for body text |
| Black text on #274D42 | 2.22:1 | Fails | Lc 12.3 | Not readable |
| #274D42 text on white | 9.43:1 | AAA | Lc 91.7 | Preferred for body text |
| #274D42 text on black | 2.22:1 | Fails | Lc -10.7 | 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
#F2F6F5
oklch(97% 0.004 179.7)
-
Step 100
100
#E3ECE9
oklch(93.5% 0.01 174.3)
-
Step 200
200
#CDDED8
oklch(88.6% 0.02 172.7)
-
Step 300
300
#AAC9BE
oklch(81% 0.037 171.9)
-
Step 400
400
#7BAD9D
oklch(70.7% 0.058 172.7)
-
Step 500
500
#579885
oklch(63% 0.073 173)
-
Step 600
600
#3A836F
oklch(55.7% 0.08 172.8)
-
Step 700
700
#2B6E5D
oklch(49% 0.073 173.7)
-
Step 800
800
#255A4C
oklch(42.7% 0.061 173.4)
-
Step 900
900 (this color)
#274D42
oklch(38.8% 0.048 172.9)
-
Step 950
950
#162B25
oklch(26.9% 0.03 173.8)
#274D42 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) | #4B4941 | 0.050 |
| Deuteranopia (no green cones) | #454443 | 0.048 |
| Tritanopia (no blue cones) | #1A4E4A | 0.015 |
| Achromatopsia (no color) | #464646 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274D42
#274D42
oklch(38.8% 0.048 172.9)
- #593A47
#593A47
oklch(38.9% 0.048 352.7)
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 #274D42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.025
- Dark Blue Green #005249 ΔE 0.025
- Dark Teal #014D4E ΔE 0.029
- Deep Teal #00555A ΔE 0.042
- Charcoal #264653 ΔE 0.043
- Charcoal Grey #3C4142 ΔE 0.046
- Evergreen #05472A ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.056
Use #274D42 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.