#33554B
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42% 0.043 173.5), rgb(51, 85, 75).
Aa
White text reads best on this color (8.26:1).
About this color
#33554B is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.043 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.024 away. White text reads best on it, at 8.26:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.54:1 |
| White text | 8.26:1 |
Values
| HEX | #33554B |
| RGB | rgb(51, 85, 75) |
| HSL | hsl(162, 25%, 27%) |
| OKLCH | oklch(42% 0.043 173.5) |
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 #33554B | 8.26:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #33554B | 2.54:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #33554B text on white | 8.26:1 | AAA | Lc 88.5 | Fine for body text |
| #33554B text on black | 2.54:1 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E5EBE9
oklch(93.5% 0.007 174.4)
-
Step 200
200
#D0DCD8
oklch(88.4% 0.014 174.1)
-
Step 300
300
#B1C6BF
oklch(80.9% 0.025 173.7)
-
Step 400
400
#87A99E
oklch(70.6% 0.041 173.4)
-
Step 500
500
#699487
oklch(63.1% 0.051 173.9)
-
Step 600
600
#4F7E70
oklch(55.5% 0.056 173.4)
-
Step 700
700
#406B5E
oklch(49.2% 0.053 172.8)
-
Step 800
800 (this color)
#33554B
oklch(42% 0.043 173.5)
-
Step 900
900
#2E4840
oklch(37.8% 0.035 173.1)
-
Step 950
950
#1B2A25
oklch(27% 0.022 171.9)
#33554B 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) | #53514B | 0.046 |
| Deuteranopia (no green cones) | #4D4D4C | 0.043 |
| Tritanopia (no blue cones) | #295652 | 0.014 |
| Achromatopsia (no color) | #4E4E4E | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33554B
#33554B
oklch(42% 0.043 173.5)
- #60434F
#60434F
oklch(41.9% 0.044 352.6)
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 #33554B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.024
- Dark Blue Green #005249 ΔE 0.039
- Deep Teal #00555A ΔE 0.039
- Dark Green Blue #1F6357 ΔE 0.043
- Dark Teal #014D4E ΔE 0.049
- Pine #2B5D34 ΔE 0.052
- Petrol #005F6A ΔE 0.054
- Charcoal #264653 ΔE 0.059
Use #33554B 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.