#33555D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.7% 0.042 214.3), rgb(51, 85, 93).
Aa
White text reads best on this color (8.08:1).
About this color
#33555D is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.042 and its hue 214°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.027 away. White text reads best on it, at 8.08:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.59:1 |
| White text | 8.08:1 |
Values
| HEX | #33555D |
| RGB | rgb(51, 85, 93) |
| HSL | hsl(191, 29%, 28%) |
| OKLCH | oklch(42.7% 0.042 214.3) |
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 #33555D | 8.08:1 | AAA | Lc -92.6 | Preferred for body text |
| Black text on #33555D | 2.59:1 | Fails | Lc 16.1 | Dividers and decoration only |
| #33555D text on white | 8.08:1 | AAA | Lc 87.9 | Fine for body text |
| #33555D text on black | 2.59:1 | 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
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D0DCDF
oklch(88.6% 0.014 214.4)
-
Step 300
300
#B0C5CA
oklch(80.9% 0.024 213.6)
-
Step 400
400
#86A7B0
oklch(70.7% 0.039 216.2)
-
Step 500
500
#66929C
oklch(63.2% 0.05 213.4)
-
Step 600
600
#4D7C87
oklch(55.7% 0.054 214.2)
-
Step 700
700
#3D6872
oklch(49% 0.05 214.2)
-
Step 800
800 (this color)
#33555D
oklch(42.7% 0.042 214.3)
-
Step 900
900
#2D464C
oklch(37.6% 0.032 214.4)
-
Step 950
950
#1B292D
oklch(27% 0.02 217.4)
#33555D 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) | #4F535D | 0.038 |
| Deuteranopia (no green cones) | #484E5D | 0.034 |
| Tritanopia (no blue cones) | #215857 | 0.024 |
| Achromatopsia (no color) | #505050 | 0.042 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33555D
#33555D
oklch(42.7% 0.042 214.3)
- #644740
#644740
oklch(42.8% 0.042 34)
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 #33555D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.027
- Deep Teal #00555A ΔE 0.035
- Petrol #005F6A ΔE 0.039
- YInMn Blue #415A77 ΔE 0.048
- Dark Green Blue #1F6357 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.051
- Charcoal #264653 ΔE 0.052
- Dark Blue Green #005249 ΔE 0.053
Use #33555D 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.