#2F5657
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.5% 0.044 197.7), rgb(47, 86, 87).
Aa
White text reads best on this color (8.10:1).
About this color
#2F5657 is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.044 and its hue 198°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.023 away. White text reads best on it, at 8.10:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.58:1 |
| White text | 8.10:1 |
Values
| HEX | #2F5657 |
| RGB | rgb(47, 86, 87) |
| HSL | hsl(182, 30%, 26%) |
| OKLCH | oklch(42.5% 0.044 197.7) |
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 #2F5657 | 8.10:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #2F5657 | 2.58:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #2F5657 text on white | 8.10:1 | AAA | Lc 88.0 | Fine for body text |
| #2F5657 text on black | 2.58:1 | Fails | Lc -14.2 | 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 800.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4EBEB
oklch(93.5% 0.007 197)
-
Step 200
200
#CFDCDC
oklch(88.5% 0.014 196.9)
-
Step 300
300
#AEC6C6
oklch(80.9% 0.026 196.6)
-
Step 400
400
#83A9AA
oklch(70.7% 0.041 198.3)
-
Step 500
500
#629495
oklch(63.2% 0.054 197.5)
-
Step 600
600
#487E7F
oklch(55.6% 0.058 197.2)
-
Step 700
700
#396A6B
oklch(49% 0.053 197.3)
-
Step 800
800 (this color)
#2F5657
oklch(42.5% 0.044 197.7)
-
Step 900
900
#2B4748
oklch(37.6% 0.034 198.7)
-
Step 950
950
#192A2A
oklch(27% 0.023 195.9)
#2F5657 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) | #515357 | 0.045 |
| Deuteranopia (no green cones) | #4A4D57 | 0.043 |
| Tritanopia (no blue cones) | #1C5856 | 0.017 |
| Achromatopsia (no color) | #505050 | 0.045 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F5657
#2F5657
oklch(42.5% 0.044 197.7)
- #654545
#654545
oklch(42.6% 0.044 19.1)
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 #2F5657, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.023
- Deep Teal #00555A ΔE 0.030
- Petrol #005F6A ΔE 0.039
- Dark Green Blue #1F6357 ΔE 0.043
- Dark Blue Green #005249 ΔE 0.043
- Dark Teal #014D4E ΔE 0.048
- Charcoal #264653 ΔE 0.054
- Dark Grey Blue #29465B ΔE 0.056
Use #2F5657 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.