#33554D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(42.1% 0.042 177.5), rgb(51, 85, 77).
Aa
White text reads best on this color (8.24:1).
About this color
#33554D is a dark, muted teal or cyan. In OKLCH its lightness is 42%, its chroma 0.042 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.022 away. White text reads best on it, at 8.24:1.
| Hue family | Teals and cyans |
| Lightness | dark (42%) |
| Chroma | muted (0.042) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.54:1 |
| White text | 8.24:1 |
Values
| HEX | #33554D |
| RGB | rgb(51, 85, 77) |
| HSL | hsl(166, 25%, 27%) |
| OKLCH | oklch(42.1% 0.042 177.5) |
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 #33554D | 8.24:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #33554D | 2.54:1 | Fails | Lc 15.6 | Dividers and decoration only |
| #33554D text on white | 8.24:1 | AAA | Lc 88.4 | Fine for body text |
| #33554D text on black | 2.54:1 | 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
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E5EBEA
oklch(93.5% 0.007 185.3)
-
Step 200
200
#D0DCD9
oklch(88.5% 0.014 179.4)
-
Step 300
300
#B1C6C0
oklch(80.9% 0.024 176.7)
-
Step 400
400
#87A9A0
oklch(70.7% 0.04 177.2)
-
Step 500
500
#689489
oklch(63.1% 0.051 177.3)
-
Step 600
600
#4F7E73
oklch(55.6% 0.054 177.7)
-
Step 700
700
#3F6A60
oklch(49% 0.051 177.6)
-
Step 800
800 (this color)
#33554D
oklch(42.1% 0.042 177.5)
-
Step 900
900
#2E4741
oklch(37.5% 0.033 177.8)
-
Step 950
950
#1B2A26
oklch(27% 0.022 176.2)
#33554D 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) | #53514D | 0.045 |
| Deuteranopia (no green cones) | #4D4D4E | 0.043 |
| Tritanopia (no blue cones) | #285653 | 0.013 |
| Achromatopsia (no color) | #4F4F4F | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33554D
#33554D
oklch(42.1% 0.042 177.5)
- #61444D
#61444D
oklch(42.2% 0.042 358.8)
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 #33554D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.022
- Deep Teal #00555A ΔE 0.037
- Dark Blue Green #005249 ΔE 0.039
- Dark Green Blue #1F6357 ΔE 0.043
- Dark Teal #014D4E ΔE 0.049
- Petrol #005F6A ΔE 0.051
- Pine #2B5D34 ΔE 0.055
- Charcoal #264653 ΔE 0.058
Use #33554D 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.