#33575E
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.3% 0.043 211.3), rgb(51, 87, 94).
Aa
White text reads best on this color (7.87:1).
About this color
#33575E is a dark, muted teal or cyan. In OKLCH its lightness is 43%, its chroma 0.043 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.032 away. White text reads best on it, at 7.87:1.
| Hue family | Teals and cyans |
| Lightness | dark (43%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.66:1 |
| White text | 7.87:1 |
Values
| HEX | #33575E |
| RGB | rgb(51, 87, 94) |
| HSL | hsl(190, 30%, 28%) |
| OKLCH | oklch(43.3% 0.043 211.3) |
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 #33575E | 7.87:1 | AAA | Lc -92.0 | Preferred for body text |
| Black text on #33575E | 2.66:1 | Fails | Lc 16.7 | Dividers and decoration only |
| #33575E text on white | 7.87:1 | AAA | Lc 87.3 | Fine for body text |
| #33575E text on black | 2.66:1 | Fails | Lc -14.9 | 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
#CFDCDE
oklch(88.5% 0.014 207.9)
-
Step 300
300
#AFC5CA
oklch(80.8% 0.025 212.9)
-
Step 400
400
#84A8AF
oklch(70.7% 0.041 210.8)
-
Step 500
500
#64929B
oklch(63% 0.052 211.1)
-
Step 600
600
#4A7C86
oklch(55.5% 0.056 211.8)
-
Step 700
700
#3B6972
oklch(49.2% 0.052 211.6)
-
Step 800
800 (this color)
#33575E
oklch(43.3% 0.043 211.3)
-
Step 900
900
#2C474C
oklch(37.8% 0.034 210.4)
-
Step 950
950
#1A292C
oklch(26.9% 0.021 211.4)
#33575E 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) | #51555E | 0.040 |
| Deuteranopia (no green cones) | #4A4F5E | 0.037 |
| Tritanopia (no blue cones) | #205A59 | 0.023 |
| Achromatopsia (no color) | #515151 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #33575E
#33575E
oklch(43.3% 0.043 211.3)
- #664842
#664842
oklch(43.3% 0.043 31.6)
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 #33575E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.032
- Petrol #005F6A ΔE 0.036
- Deep Teal #00555A ΔE 0.037
- Dark Green Blue #1F6357 ΔE 0.046
- YInMn Blue #415A77 ΔE 0.046
- Dark Blue Green #005249 ΔE 0.055
- Dark Aqua #05696B ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.057
Use #33575E 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.