#3F6963
Closest named color: Dark Aqua (#05696B). oklch(48.8% 0.048 184.3), rgb(63, 105, 99).
Aa
White text reads best on this color (6.15:1).
About this color
#3F6963 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 49%, its chroma 0.048 and its hue 184°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Aqua (#05696B), ΔE 0.037 away. White text reads best on it, at 6.15:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (49%) |
| Chroma | muted (0.048) |
| Temperature | cool |
| Nearest name | Dark Aqua (#05696B) |
| Black text | 3.41:1 |
| White text | 6.15:1 |
Values
| HEX | #3F6963 |
| RGB | rgb(63, 105, 99) |
| HSL | hsl(171, 25%, 33%) |
| OKLCH | oklch(48.8% 0.048 184.3) |
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 #3F6963 | 6.15:1 | AA | Lc -85.8 | Fine for body text |
| Black text on #3F6963 | 3.41:1 | AA large text | Lc 23.4 | Dividers and decoration only |
| #3F6963 text on white | 6.15:1 | AA | Lc 80.6 | Fine for body text |
| #3F6963 text on black | 3.41:1 | AA large text | Lc -21.2 | 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
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E5EBEA
oklch(93.5% 0.007 185.3)
-
Step 200
200
#D0DCDA
oklch(88.5% 0.013 185.1)
-
Step 300
300
#B1C6C2
oklch(81% 0.024 183)
-
Step 400
400
#87A9A3
oklch(70.8% 0.038 183.3)
-
Step 500
500
#69938D
oklch(63.1% 0.047 185.1)
-
Step 600
600
#4F7D77
oklch(55.5% 0.051 185.5)
-
Step 700
700 (this color)
#3F6963
oklch(48.8% 0.048 184.3)
-
Step 800
800
#355651
oklch(42.6% 0.04 183.8)
-
Step 900
900
#2E4743
oklch(37.6% 0.032 183.5)
-
Step 950
950
#1C2A27
oklch(27.1% 0.02 180)
#3F6963 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) | #656563 | 0.051 |
| Deuteranopia (no green cones) | #5E5F64 | 0.049 |
| Tritanopia (no blue cones) | #306B67 | 0.014 |
| Achromatopsia (no color) | #616161 | 0.048 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F6963
#3F6963
oklch(48.8% 0.048 184.3)
- #78555C
#78555C
oklch(48.9% 0.048 5.7)
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 #3F6963, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Aqua #05696B ΔE 0.037
- Slate #516572 ΔE 0.039
- Dark Green Blue #1F6357 ΔE 0.041
- Dark Aquamarine #017371 ΔE 0.041
- Deep Turquoise #017374 ΔE 0.042
- Deep Aqua #08787F ΔE 0.056
- Bluegreen #017A79 ΔE 0.056
- Petrol #005F6A ΔE 0.058
Use #3F6963 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.