#274A42
Closest named color: Dark Slate Gray (#2F4F4F). oklch(38% 0.043 177.4), rgb(39, 74, 66).
Aa
White text reads best on this color (9.79:1).
About this color
#274A42 is a dark, muted teal or cyan. In OKLCH its lightness is 38%, its chroma 0.043 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.027 away. White text reads best on it, at 9.79:1.
| Hue family | Teals and cyans |
| Lightness | dark (38%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.14:1 |
| White text | 9.79:1 |
Values
| HEX | #274A42 |
| RGB | rgb(39, 74, 66) |
| HSL | hsl(166, 31%, 22%) |
| OKLCH | oklch(38% 0.043 177.4) |
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 #274A42 | 9.79:1 | AAA | Lc -96.8 | Preferred for body text |
| Black text on #274A42 | 2.14:1 | Fails | Lc 11.3 | Not readable |
| #274A42 text on white | 9.79:1 | AAA | Lc 92.6 | Preferred for body text |
| #274A42 text on black | 2.14:1 | Fails | Lc -9.8 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CDDDD9
oklch(88.4% 0.018 179.3)
-
Step 300
300
#ABC8C0
oklch(80.9% 0.033 177)
-
Step 400
400
#7EACA0
oklch(70.8% 0.052 176.8)
-
Step 500
500
#5B9789
oklch(63.1% 0.066 177.5)
-
Step 600
600
#3F8173
oklch(55.6% 0.071 177.9)
-
Step 700
700
#306D60
oklch(49% 0.067 177.4)
-
Step 800
800
#29594F
oklch(42.7% 0.055 178.1)
-
Step 900
900 (this color)
#274A42
oklch(38% 0.043 177.4)
-
Step 950
950
#172B26
oklch(27% 0.028 176.4)
#274A42 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) | #484642 | 0.047 |
| Deuteranopia (no green cones) | #424243 | 0.044 |
| Tritanopia (no blue cones) | #1A4B48 | 0.014 |
| Achromatopsia (no color) | #444444 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274A42
#274A42
oklch(38% 0.043 177.4)
- #553942
#553942
oklch(38% 0.042 358.3)
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 #274A42, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.027
- Dark Teal #014D4E ΔE 0.027
- Dark Blue Green #005249 ΔE 0.031
- Charcoal #264653 ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.039
- Deep Teal #00555A ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.050
- Evergreen #05472A ΔE 0.050
Use #274A42 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.