#2D5553
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42% 0.045 191.4), rgb(45, 85, 83).
Aa
White text reads best on this color (8.28:1).
About this color
#2D5553 is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.045 and its hue 191°. 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 8.28:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.045) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.53:1 |
| White text | 8.28:1 |
Values
| HEX | #2D5553 |
| RGB | rgb(45, 85, 83) |
| HSL | hsl(177, 31%, 25%) |
| OKLCH | oklch(42% 0.045 191.4) |
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 #2D5553 | 8.28:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #2D5553 | 2.53:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #2D5553 text on white | 8.28:1 | AAA | Lc 88.5 | Fine for body text |
| #2D5553 text on black | 2.53:1 | Fails | Lc -13.7 | 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 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
#CFDCDB
oklch(88.4% 0.014 191.4)
-
Step 300
300
#AEC6C5
oklch(80.8% 0.026 193.6)
-
Step 400
400
#82A9A7
oklch(70.6% 0.042 192.3)
-
Step 500
500
#629491
oklch(63% 0.054 191.1)
-
Step 600
600
#477F7C
oklch(55.7% 0.06 191.1)
-
Step 700
700
#386B68
oklch(49.1% 0.055 190.6)
-
Step 800
800 (this color)
#2D5553
oklch(42% 0.045 191.4)
-
Step 900
900
#2A4846
oklch(37.8% 0.036 190.3)
-
Step 950
950
#192A29
oklch(27% 0.023 191.2)
#2D5553 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) | #515153 | 0.049 |
| Deuteranopia (no green cones) | #4A4C53 | 0.045 |
| Tritanopia (no blue cones) | #1A5754 | 0.016 |
| Achromatopsia (no color) | #4E4E4E | 0.046 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2D5553
#2D5553
oklch(42% 0.045 191.4)
- #634347
#634347
oklch(42% 0.045 10.9)
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 #2D5553, 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 0.028
- Dark Blue Green #005249 ΔE 0.037
- Dark Teal #014D4E ΔE 0.043
- Petrol #005F6A ΔE 0.043
- Dark Green Blue #1F6357 ΔE 0.044
- Charcoal #264653 ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.056
Use #2D5553 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.