#274D59
Closest named color: Dark Slate Gray (#2F4F4F). oklch(39.7% 0.048 220.7), rgb(39, 77, 89).
Aa
White text reads best on this color (9.16:1).
About this color
#274D59 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.048 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.022 away. White text reads best on it, at 9.16:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.29:1 |
| White text | 9.16:1 |
Values
| HEX | #274D59 |
| RGB | rgb(39, 77, 89) |
| HSL | hsl(194, 39%, 25%) |
| OKLCH | oklch(39.7% 0.048 220.7) |
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 #274D59 | 9.16:1 | AAA | Lc -95.4 | Preferred for body text |
| Black text on #274D59 | 2.29:1 | Fails | Lc 13.0 | Not readable |
| #274D59 text on white | 9.16:1 | AAA | Lc 91.0 | Preferred for body text |
| #274D59 text on black | 2.29:1 | Fails | Lc -11.3 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E3ECEF
oklch(93.7% 0.01 219.6)
-
Step 200
200
#CCDCE2
oklch(88.4% 0.019 222.2)
-
Step 300
300
#A8C6D1
oklch(80.8% 0.036 222)
-
Step 400
400
#78A9BA
oklch(70.6% 0.058 221.5)
-
Step 500
500
#5394A9
oklch(63.1% 0.074 221)
-
Step 600
600
#347E94
oklch(55.6% 0.08 220.6)
-
Step 700
700
#266A7E
oklch(49.1% 0.074 220.9)
-
Step 800
800
#225766
oklch(42.8% 0.061 219.5)
-
Step 900
900 (this color)
#274D59
oklch(39.7% 0.048 220.7)
-
Step 950
950
#142A31
oklch(27% 0.031 220.6)
#274D59 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) | #464B5A | 0.040 |
| Deuteranopia (no green cones) | #3E4559 | 0.037 |
| Tritanopia (no blue cones) | #065151 | 0.031 |
| Achromatopsia (no color) | #484848 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274D59
#274D59
oklch(39.7% 0.048 220.7)
- #5D3E33
#5D3E33
oklch(39.6% 0.048 40.3)
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 #274D59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.022
- Charcoal #264653 ΔE 0.023
- Dark Grey Blue #29465B ΔE 0.024
- Deep Teal #00555A ΔE 0.031
- Dark Teal #014D4E ΔE 0.033
- Dark Blue Green #005249 ΔE 0.044
- Charcoal Grey #3C4142 ΔE 0.049
- Petrol #005F6A ΔE 0.056
Use #274D59 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.