#3A575F
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.7% 0.037 216.9), rgb(58, 87, 95).
Aa
White text reads best on this color (7.75:1).
About this color
#3A575F is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.037 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.037 away. White text reads best on it, at 7.75:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.037) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.70:1 |
| White text | 7.75:1 |
Values
| HEX | #3A575F |
| RGB | rgb(58, 87, 95) |
| HSL | hsl(193, 24%, 30%) |
| OKLCH | oklch(43.7% 0.037 216.9) |
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 #3A575F | 7.75:1 | AAA | Lc -91.6 | Preferred for body text |
| Black text on #3A575F | 2.70:1 | Fails | Lc 17.1 | Dividers and decoration only |
| #3A575F text on white | 7.75:1 | AAA | Lc 86.9 | Fine for body text |
| #3A575F text on black | 2.70:1 | Fails | Lc -15.2 | Dividers and decoration only |
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
#E5EBEC
oklch(93.6% 0.007 208.8)
-
Step 200
200
#D1DBDE
oklch(88.5% 0.012 217.6)
-
Step 300
300
#B2C4CA
oklch(80.8% 0.021 219.7)
-
Step 400
400
#89A6AF
oklch(70.6% 0.035 218.6)
-
Step 500
500
#6B909B
oklch(63% 0.044 218)
-
Step 600
600
#527B86
oklch(55.7% 0.049 216.4)
-
Step 700
700
#436771
oklch(49% 0.044 217.1)
-
Step 800
800 (this color)
#3A575F
oklch(43.7% 0.037 216.9)
-
Step 900
900
#30464C
oklch(37.8% 0.029 216.5)
-
Step 950
950
#1C292C
oklch(27% 0.019 213.5)
#3A575F 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) | #51555F | 0.032 |
| Deuteranopia (no green cones) | #4C515F | 0.029 |
| Tritanopia (no blue cones) | #2C5A59 | 0.022 |
| Achromatopsia (no color) | #525252 | 0.037 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A575F
#3A575F
oklch(43.7% 0.037 216.9)
- #644B43
#644B43
oklch(43.7% 0.037 38.5)
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 #3A575F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.037
- Petrol #005F6A ΔE 0.041
- YInMn Blue #415A77 ΔE 0.041
- Deep Teal #00555A ΔE 0.045
- Dark Green Blue #1F6357 ΔE 0.050
- Dusty Grape #545775 ΔE 0.054
- Dark Aqua #05696B ΔE 0.059
- Slate #516572 ΔE 0.060
Use #3A575F 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.