#274F53
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40% 0.046 204), rgb(39, 79, 83).
Aa
White text reads best on this color (9.01:1).
About this color
#274F53 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.046 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.010 away. White text reads best on it, at 9.01:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.046) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.32:1 |
| White text | 9.01:1 |
Values
| HEX | #274F53 |
| RGB | rgb(39, 79, 83) |
| HSL | hsl(185, 36%, 24%) |
| OKLCH | oklch(40% 0.046 204) |
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 #274F53 | 9.01:1 | AAA | Lc -95.0 | Preferred for body text |
| Black text on #274F53 | 2.32:1 | Fails | Lc 13.4 | Not readable |
| #274F53 text on white | 9.01:1 | AAA | Lc 90.6 | Preferred for body text |
| #274F53 text on black | 2.32:1 | Fails | Lc -11.7 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3ECED
oklch(93.7% 0.01 204.9)
-
Step 200
200
#CBDDDF
oklch(88.5% 0.019 204.8)
-
Step 300
300
#A8C7CB
oklch(80.8% 0.034 206)
-
Step 400
400
#78ABB0
oklch(70.7% 0.054 203.7)
-
Step 500
500
#52969D
oklch(63.1% 0.07 204.2)
-
Step 600
600
#328088
oklch(55.5% 0.076 204.6)
-
Step 700
700
#246C73
oklch(49% 0.07 204.3)
-
Step 800
800
#20585E
oklch(42.6% 0.058 205)
-
Step 900
900 (this color)
#274F53
oklch(40% 0.046 204)
-
Step 950
950
#142B2D
oklch(27.1% 0.029 202.9)
#274F53 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) | #4A4C53 | 0.046 |
| Deuteranopia (no green cones) | #424753 | 0.041 |
| Tritanopia (no blue cones) | #0D5250 | 0.022 |
| Achromatopsia (no color) | #494949 | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #274F53
#274F53
oklch(40% 0.046 204)
- #5E3E3C
#5E3E3C
oklch(40% 0.045 23.3)
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 #274F53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.010
- Deep Teal #00555A ΔE 0.026
- Dark Teal #014D4E ΔE 0.028
- Charcoal #264653 ΔE 0.030
- Dark Blue Green #005249 ΔE 0.033
- Dark Grey Blue #29465B ΔE 0.036
- Charcoal Grey #3C4142 ΔE 0.048
- Petrol #005F6A ΔE 0.054
Use #274F53 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.