#3F5B60
Closest named color: YInMn Blue (#415A77). oklch(45.1% 0.034 209.8), rgb(63, 91, 96).
Aa
White text reads best on this color (7.30:1).
About this color
#3F5B60 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 45%, its chroma 0.034 and its hue 210°. Its hue sits on the cool side of the wheel. The nearest named color is YInMn Blue (#415A77), ΔE 0.040 away. White text reads best on it, at 7.30:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (45%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | YInMn Blue (#415A77) |
| Black text | 2.87:1 |
| White text | 7.30:1 |
Values
| HEX | #3F5B60 |
| RGB | rgb(63, 91, 96) |
| HSL | hsl(189, 21%, 31%) |
| OKLCH | oklch(45.1% 0.034 209.8) |
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 #3F5B60 | 7.30:1 | AAA | Lc -90.2 | Preferred for body text |
| Black text on #3F5B60 | 2.87:1 | Fails | Lc 18.7 | Dividers and decoration only |
| #3F5B60 text on white | 7.30:1 | AAA | Lc 85.3 | Fine for body text |
| #3F5B60 text on black | 2.87:1 | Fails | Lc -16.7 | 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
#D1DBDD
oklch(88.4% 0.011 211)
-
Step 300
300
#B3C4C8
oklch(80.9% 0.019 213.4)
-
Step 400
400
#8AA6AC
oklch(70.6% 0.032 212.1)
-
Step 500
500
#6D9197
oklch(63.2% 0.041 208.8)
-
Step 600
600
#547B82
oklch(55.7% 0.045 209.9)
-
Step 700
700
#44676E
oklch(49% 0.042 211.5)
-
Step 800
800 (this color)
#3F5B60
oklch(45.1% 0.034 209.8)
-
Step 900
900
#314649
oklch(37.8% 0.027 207.1)
-
Step 950
950
#1D292B
oklch(27.1% 0.017 208.8)
#3F5B60 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) | #565960 | 0.032 |
| Deuteranopia (no green cones) | #515560 | 0.030 |
| Tritanopia (no blue cones) | #335E5C | 0.019 |
| Achromatopsia (no color) | #565656 | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F5B60
#3F5B60
oklch(45.1% 0.034 209.8)
- #674F4A
#674F4A
oklch(45.1% 0.034 31.9)
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 #3F5B60, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- YInMn Blue #415A77 ΔE 0.040
- Petrol #005F6A ΔE 0.043
- Dark Green Blue #1F6357 ΔE 0.044
- Slate #516572 ΔE 0.047
- Dark Slate Gray #2F4F4F ΔE 0.049
- Dusty Grape #545775 ΔE 0.051
- Dark Aqua #05696B ΔE 0.051
- Deep Teal #00555A ΔE 0.055
Use #3F5B60 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.