#2F5555
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.1% 0.043 195.6), rgb(47, 85, 85).
Aa
White text reads best on this color (8.23:1).
About this color
#2F5555 is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.043 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.019 away. White text reads best on it, at 8.23:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.55:1 |
| White text | 8.23:1 |
Values
| HEX | #2F5555 |
| RGB | rgb(47, 85, 85) |
| HSL | hsl(180, 29%, 26%) |
| OKLCH | oklch(42.1% 0.043 195.6) |
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 #2F5555 | 8.23:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #2F5555 | 2.55:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #2F5555 text on white | 8.23:1 | AAA | Lc 88.4 | Fine for body text |
| #2F5555 text on black | 2.55:1 | Fails | Lc -13.8 | 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 800.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEB
oklch(93.6% 0.006 197)
-
Step 200
200
#CFDCDC
oklch(88.5% 0.014 196.9)
-
Step 300
300
#AFC6C6
oklch(80.9% 0.025 196.7)
-
Step 400
400
#84A9A9
oklch(70.8% 0.04 196.3)
-
Step 500
500
#639493
oklch(63.2% 0.053 194.3)
-
Step 600
600
#497E7E
oklch(55.6% 0.057 195.6)
-
Step 700
700
#3A6A6A
oklch(49% 0.052 195.6)
-
Step 800
800 (this color)
#2F5555
oklch(42.1% 0.043 195.6)
-
Step 900
900
#2B4747
oklch(37.6% 0.034 195.8)
-
Step 950
950
#1A2A2A
oklch(27.1% 0.021 196)
#2F5555 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) | #515255 | 0.046 |
| Deuteranopia (no green cones) | #4A4D55 | 0.042 |
| Tritanopia (no blue cones) | #1D5755 | 0.016 |
| Achromatopsia (no color) | #4F4F4F | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2F5555
#2F5555
oklch(42.1% 0.043 195.6)
- #634445
#634445
oklch(42.2% 0.043 16.9)
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 #2F5555, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.019
- Deep Teal #00555A ΔE 0.029
- Dark Blue Green #005249 ΔE 0.041
- Petrol #005F6A ΔE 0.042
- Dark Green Blue #1F6357 ΔE 0.045
- Dark Teal #014D4E ΔE 0.046
- Charcoal #264653 ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.055
Use #2F5555 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.