#3F5B59
Closest named color: Dark Green Blue (#1F6357). oklch(44.8% 0.033 190.5), rgb(63, 91, 89).
Aa
White text reads best on this color (7.36:1).
About this color
#3F5B59 is a dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.033 and its hue 190°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Green Blue (#1F6357), ΔE 0.038 away. White text reads best on it, at 7.36:1.
| Hue family | Teals and cyans |
| Lightness | dark (45%) |
| Chroma | muted (0.033) |
| Temperature | cool |
| Nearest name | Dark Green Blue (#1F6357) |
| Black text | 2.85:1 |
| White text | 7.36:1 |
Values
| HEX | #3F5B59 |
| RGB | rgb(63, 91, 89) |
| HSL | hsl(176, 18%, 30%) |
| OKLCH | oklch(44.8% 0.033 190.5) |
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 #3F5B59 | 7.36:1 | AAA | Lc -90.4 | Preferred for body text |
| Black text on #3F5B59 | 2.85:1 | Fails | Lc 18.5 | Dividers and decoration only |
| #3F5B59 text on white | 7.36:1 | AAA | Lc 85.6 | Fine for body text |
| #3F5B59 text on black | 2.85:1 | Fails | Lc -16.5 | 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
#E6EBEB
oklch(93.6% 0.005 197.1)
-
Step 200
200
#D1DBDB
oklch(88.4% 0.011 197)
-
Step 300
300
#B3C5C3
oklch(80.9% 0.02 188.7)
-
Step 400
400
#8BA7A5
oklch(70.7% 0.031 191.2)
-
Step 500
500
#6E928F
oklch(63.2% 0.04 189.8)
-
Step 600
600
#557C79
oklch(55.6% 0.044 189.9)
-
Step 700
700
#456866
oklch(49% 0.04 191.4)
-
Step 800
800 (this color)
#3F5B59
oklch(44.8% 0.033 190.5)
-
Step 900
900
#314645
oklch(37.6% 0.026 192.4)
-
Step 950
950
#1D2928
oklch(26.9% 0.017 189.9)
#3F5B59 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) | #585859 | 0.036 |
| Deuteranopia (no green cones) | #535459 | 0.034 |
| Tritanopia (no blue cones) | #365C5A | 0.010 |
| Achromatopsia (no color) | #565656 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5B59
#3F5B59
oklch(44.8% 0.033 190.5)
- #664D50
#664D50
oklch(44.8% 0.034 10.5)
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 #3F5B59, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Green Blue #1F6357 ΔE 0.038
- Dark Slate Gray #2F4F4F ΔE 0.046
- Petrol #005F6A ΔE 0.046
- YInMn Blue #415A77 ΔE 0.052
- Dark Aqua #05696B ΔE 0.052
- Slate #516572 ΔE 0.053
- Deep Teal #00555A ΔE 0.054
- Dusty Grape #545775 ΔE 0.061
Use #3F5B59 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.