#3F6372
Closest named color: Slate (#516572). oklch(47.9% 0.048 226.2), rgb(63, 99, 114).
Aa
White text reads best on this color (6.48:1).
About this color
#3F6372 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 48%, its chroma 0.048 and its hue 226°. Its hue sits on the cool side of the wheel. The nearest named color is Slate (#516572), ΔE 0.024 away. White text reads best on it, at 6.48:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (48%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Slate (#516572) |
| Black text | 3.23:1 |
| White text | 6.48:1 |
Values
| HEX | #3F6372 |
| RGB | rgb(63, 99, 114) |
| HSL | hsl(198, 29%, 35%) |
| OKLCH | oklch(47.9% 0.048 226.2) |
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 #3F6372 | 6.48:1 | AA | Lc -87.2 | Fine for body text |
| Black text on #3F6372 | 3.23:1 | AA large text | Lc 22.0 | Dividers and decoration only |
| #3F6372 text on white | 6.48:1 | AA | Lc 82.1 | Fine for body text |
| #3F6372 text on black | 3.23:1 | AA large text | Lc -19.8 | 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 700.
-
Step 50
50
#F3F6F7
oklch(97.1% 0.003 219.5)
-
Step 100
100
#E5EBED
oklch(93.6% 0.007 219.6)
-
Step 200
200
#D1DBE0
oklch(88.5% 0.013 228.9)
-
Step 300
300
#B2C4CC
oklch(80.9% 0.023 226.2)
-
Step 400
400
#89A6B2
oklch(70.7% 0.037 224.9)
-
Step 500
500
#6B90A0
oklch(63.2% 0.048 226.4)
-
Step 600
600
#527A8B
oklch(55.6% 0.052 226.5)
-
Step 700
700 (this color)
#3F6372
oklch(47.9% 0.048 226.2)
-
Step 800
800
#375460
oklch(42.8% 0.04 225.8)
-
Step 900
900
#30454E
oklch(37.7% 0.03 226.3)
-
Step 950
950
#1C292E
oklch(27.1% 0.02 223.6)
#3F6372 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) | #5B6173 | 0.037 |
| Deuteranopia (no green cones) | #535B72 | 0.034 |
| Tritanopia (no blue cones) | #2A6868 | 0.033 |
| Achromatopsia (no color) | #5E5E5E | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F6372
#3F6372
oklch(47.9% 0.048 226.2)
- #745546
#745546
oklch(47.8% 0.048 46.9)
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 #3F6372, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Slate #516572 ΔE 0.024
- YInMn Blue #415A77 ΔE 0.031
- Denim #3B638C ΔE 0.043
- Dark Aqua #05696B ΔE 0.044
- Dusty Grape #545775 ΔE 0.045
- Petrol #005F6A ΔE 0.048
- Light Navy Blue #2E5A88 ΔE 0.055
- Deep Turquoise #017374 ΔE 0.056
Use #3F6372 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.