#2F4D57
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.1% 0.039 221.1), rgb(47, 77, 87).
Aa
White text reads best on this color (9.05:1).
About this color
#2F4D57 is a dark, muted teal or cyan. In OKLCH its lightness is 40%, its chroma 0.039 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.017 away. White text reads best on it, at 9.05:1.
| Hue family | Teals and cyans |
| Lightness | dark (40%) |
| Chroma | muted (0.039) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.32:1 |
| White text | 9.05:1 |
Values
| HEX | #2F4D57 |
| RGB | rgb(47, 77, 87) |
| HSL | hsl(195, 30%, 26%) |
| OKLCH | oklch(40.1% 0.039 221.1) |
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 #2F4D57 | 9.05:1 | AAA | Lc -95.1 | Preferred for body text |
| Black text on #2F4D57 | 2.32:1 | Fails | Lc 13.2 | Not readable |
| #2F4D57 text on white | 9.05:1 | AAA | Lc 90.7 | Preferred for body text |
| #2F4D57 text on black | 2.32:1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E4EBEE
oklch(93.6% 0.009 225.1)
-
Step 200
200
#CEDCE1
oklch(88.5% 0.017 221.1)
-
Step 300
300
#ADC5CE
oklch(80.8% 0.029 222.4)
-
Step 400
400
#80A8B6
oklch(70.7% 0.048 221.4)
-
Step 500
500
#5F92A3
oklch(63% 0.06 221)
-
Step 600
600
#447C8F
oklch(55.6% 0.066 222.2)
-
Step 700
700
#356979
oklch(49.2% 0.061 220.3)
-
Step 800
800
#2D5563
oklch(42.6% 0.051 222.9)
-
Step 900
900 (this color)
#2F4D57
oklch(40.1% 0.039 221.1)
-
Step 950
950
#18292F
oklch(26.9% 0.025 222.2)
#2F4D57 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) | #474B58 | 0.033 |
| Deuteranopia (no green cones) | #414757 | 0.029 |
| Tritanopia (no blue cones) | #1E5050 | 0.025 |
| Achromatopsia (no color) | #494949 | 0.040 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F4D57
#2F4D57
oklch(40.1% 0.039 221.1)
- #5B4138
#5B4138
oklch(40.1% 0.039 39.9)
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 #2F4D57, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.017
- Charcoal #264653 ΔE 0.026
- Dark Grey Blue #29465B ΔE 0.028
- Deep Teal #00555A ΔE 0.036
- Dark Teal #014D4E ΔE 0.039
- Charcoal Grey #3C4142 ΔE 0.044
- Dark Blue Green #005249 ΔE 0.047
- Petrol #005F6A ΔE 0.058
Use #2F4D57 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.