#3F595A
Closest named color: Dark Slate Gray (#2F4F4F). oklch(44.4% 0.031 199.1), rgb(63, 89, 90).
Aa
White text reads best on this color (7.53:1).
About this color
#3F595A is a dark, muted teal or cyan. In OKLCH its lightness is 44%, its chroma 0.031 and its hue 199°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.041 away. White text reads best on it, at 7.53:1.
| Hue family | Teals and cyans |
| Lightness | dark (44%) |
| Chroma | muted (0.031) |
| Temperature | cool |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.78:1 |
| White text | 7.53:1 |
Values
| HEX | #3F595A |
| RGB | rgb(63, 89, 90) |
| HSL | hsl(182, 18%, 30%) |
| OKLCH | oklch(44.4% 0.031 199.1) |
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 #3F595A | 7.53:1 | AAA | Lc -91.0 | Preferred for body text |
| Black text on #3F595A | 2.78:1 | Fails | Lc 17.9 | Dividers and decoration only |
| #3F595A text on white | 7.53:1 | AAA | Lc 86.2 | Fine for body text |
| #3F595A text on black | 2.78:1 | Fails | Lc -15.9 | 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
#F4F6F6
oklch(97.2% 0.002 197.1)
-
Step 100
100
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D2DBDB
oklch(88.5% 0.01 197)
-
Step 300
300
#B4C4C5
oklch(80.8% 0.018 201.3)
-
Step 400
400
#8CA6A7
oklch(70.6% 0.029 199.4)
-
Step 500
500
#6F9192
oklch(63.1% 0.038 198.5)
-
Step 600
600
#577B7C
oklch(55.6% 0.041 198.2)
-
Step 700
700
#476769
oklch(49% 0.037 200.9)
-
Step 800
800 (this color)
#3F595A
oklch(44.4% 0.031 199.1)
-
Step 900
900
#324646
oklch(37.7% 0.025 196.1)
-
Step 950
950
#1E2929
oklch(27.1% 0.015 196.3)
#3F595A 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) | #55575A | 0.031 |
| Deuteranopia (no green cones) | #50535A | 0.029 |
| Tritanopia (no blue cones) | #365B59 | 0.012 |
| Achromatopsia (no color) | #545454 | 0.031 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F595A
#3F595A
oklch(44.4% 0.031 199.1)
- #644D4D
#644D4D
oklch(44.4% 0.031 18.4)
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 #3F595A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.041
- Dark Green Blue #1F6357 ΔE 0.043
- Petrol #005F6A ΔE 0.046
- YInMn Blue #415A77 ΔE 0.048
- Deep Teal #00555A ΔE 0.052
- Slate #516572 ΔE 0.056
- Dark Aqua #05696B ΔE 0.056
- Dusty Grape #545775 ΔE 0.058
Use #3F595A 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.