#3F7271
Closest named color: Deep Turquoise (#017374). oklch(51.6% 0.055 193.9), rgb(63, 114, 113).
Aa
White text reads best on this color (5.44:1).
About this color
#3F7271 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 52%, its chroma 0.055 and its hue 194°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Turquoise (#017374), ΔE 0.033 away. White text reads best on it, at 5.44:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Deep Turquoise (#017374) |
| Black text | 3.85:1 |
| White text | 5.44:1 |
Values
| HEX | #3F7271 |
| RGB | rgb(63, 114, 113) |
| HSL | hsl(179, 29%, 35%) |
| OKLCH | oklch(51.6% 0.055 193.9) |
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 #3F7271 | 5.44:1 | AA | Lc -82.4 | Fine for body text |
| Black text on #3F7271 | 3.85:1 | AA large text | Lc 27.0 | Dividers and decoration only |
| #3F7271 text on white | 5.44:1 | AA | Lc 77.1 | Fine for body text |
| #3F7271 text on black | 3.85:1 | AA large text | Lc -24.7 | 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 700.
-
Step 50
50
#F3F6F6
oklch(97.1% 0.003 197.1)
-
Step 100
100
#E4EBEB
oklch(93.5% 0.007 197)
-
Step 200
200
#CFDCDC
oklch(88.5% 0.014 196.9)
-
Step 300
300
#AEC6C5
oklch(80.8% 0.026 193.6)
-
Step 400
400
#82A9A8
oklch(70.6% 0.042 194.3)
-
Step 500
500
#619493
oklch(63% 0.055 194.3)
-
Step 600
600
#477E7D
oklch(55.5% 0.058 194.1)
-
Step 700
700 (this color)
#3F7271
oklch(51.6% 0.055 193.9)
-
Step 800
800
#2F5756
oklch(42.7% 0.045 193.5)
-
Step 900
900
#2A4847
oklch(37.8% 0.036 193)
-
Step 950
950
#192A2A
oklch(27% 0.023 195.9)
#3F7271 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) | #6C6D71 | 0.058 |
| Deuteranopia (no green cones) | #636771 | 0.053 |
| Tritanopia (no blue cones) | #277572 | 0.020 |
| Achromatopsia (no color) | #6A6A6A | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7271
#3F7271
oklch(51.6% 0.055 193.9)
- #845B5E
#845B5E
oklch(51.6% 0.054 14.3)
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 #3F7271, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Turquoise #017374 ΔE 0.033
- Dark Aquamarine #017371 ΔE 0.034
- Deep Aqua #08787F ΔE 0.034
- Bluegreen #017A79 ΔE 0.035
- Slate #516572 ΔE 0.044
- Teal #008080 ΔE 0.046
- Dark Aqua #05696B ΔE 0.050
- Metallic Blue #4F738E ΔE 0.052
Use #3F7271 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.