#3A575A
Closest named color: Dark Slate Gray (#2F4F4F). oklch(43.5% 0.035 204.1), rgb(58, 87, 90).
Aa
White text reads best on this color (7.80:1).
About this color
#3A575A is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.035 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.033 away. White text reads best on it, at 7.80:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.035) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.69:1 |
| White text | 7.80:1 |
Values
| HEX | #3A575A |
| RGB | rgb(58, 87, 90) |
| HSL | hsl(186, 22%, 29%) |
| OKLCH | oklch(43.5% 0.035 204.1) |
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 #3A575A | 7.80:1 | AAA | Lc -91.8 | Preferred for body text |
| Black text on #3A575A | 2.69:1 | Fails | Lc 17.0 | Dividers and decoration only |
| #3A575A text on white | 7.80:1 | AAA | Lc 87.1 | Fine for body text |
| #3A575A text on black | 2.69:1 | Fails | Lc -15.1 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E6EBEC
oklch(93.7% 0.006 211)
-
Step 200
200
#D1DBDC
oklch(88.4% 0.011 204.1)
-
Step 300
300
#B2C5C7
oklch(81% 0.021 204.4)
-
Step 400
400
#8AA7AA
oklch(70.7% 0.032 204.2)
-
Step 500
500
#6C9195
oklch(63.1% 0.041 204.5)
-
Step 600
600
#537B7F
oklch(55.5% 0.045 203.8)
-
Step 700
700
#43686C
oklch(49.1% 0.043 204.5)
-
Step 800
800 (this color)
#3A575A
oklch(43.5% 0.035 204.1)
-
Step 900
900
#304648
oklch(37.7% 0.028 203.1)
-
Step 950
950
#1D292A
oklch(27% 0.017 202.6)
#3A575A 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) | #53555A | 0.035 |
| Deuteranopia (no green cones) | #4D505A | 0.033 |
| Tritanopia (no blue cones) | #2E5958 | 0.015 |
| Achromatopsia (no color) | #525252 | 0.035 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A575A
#3A575A
oklch(43.5% 0.035 204.1)
- #634A48
#634A48
oklch(43.5% 0.034 23.8)
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 #3A575A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.033
- Petrol #005F6A ΔE 0.043
- Deep Teal #00555A ΔE 0.044
- Dark Green Blue #1F6357 ΔE 0.045
- YInMn Blue #415A77 ΔE 0.049
- Dark Blue Green #005249 ΔE 0.058
- Dark Aqua #05696B ΔE 0.059
- Dusty Grape #545775 ΔE 0.061
Use #3A575A 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.