#3F7B71
Closest named color: Bluegreen (#017A79). oklch(53.9% 0.065 181.7), rgb(63, 123, 113).
Aa
White text reads best on this color (4.90:1).
About this color
#3F7B71 is a medium-dark, muted teal or cyan. In OKLCH its lightness is 54%, its chroma 0.065 and its hue 182°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.033 away. White text reads best on it, at 4.90:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.28:1 |
| White text | 4.90:1 |
Values
| HEX | #3F7B71 |
| RGB | rgb(63, 123, 113) |
| HSL | hsl(170, 32%, 36%) |
| OKLCH | oklch(53.9% 0.065 181.7) |
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 #3F7B71 | 4.90:1 | AA | Lc -79.3 | Fine for body text |
| Black text on #3F7B71 | 4.28:1 | AA large text | Lc 30.2 | Non-text elements, placeholder text |
| #3F7B71 text on white | 4.90:1 | AA | Lc 73.8 | Content text, not long reading |
| #3F7B71 text on black | 4.28:1 | AA large text | Lc -27.9 | 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 600.
-
Step 50
50
#F3F6F5
oklch(97.1% 0.003 174.5)
-
Step 100
100
#E4ECEA
oklch(93.6% 0.009 179.6)
-
Step 200
200
#CEDDDA
oklch(88.5% 0.017 182.7)
-
Step 300
300
#ADC7C2
oklch(80.9% 0.029 182.7)
-
Step 400
400
#81ABA2
oklch(70.8% 0.047 180.2)
-
Step 500
500
#5F968C
oklch(63.2% 0.06 181.5)
-
Step 600
600 (this color)
#3F7B71
oklch(53.9% 0.065 181.7)
-
Step 700
700
#356C63
oklch(49.1% 0.06 181.8)
-
Step 800
800
#2D5851
oklch(42.7% 0.05 182.1)
-
Step 900
900
#294843
oklch(37.6% 0.038 182.8)
-
Step 950
950
#182A27
oklch(26.8% 0.024 182.8)
#3F7B71 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) | #767571 | 0.069 |
| Deuteranopia (no green cones) | #6C6E72 | 0.064 |
| Tritanopia (no blue cones) | #247D78 | 0.020 |
| Achromatopsia (no color) | #717171 | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7B71
#3F7B71
oklch(53.9% 0.065 181.7)
- #8F5F6C
#8F5F6C
oklch(54.1% 0.065 1.8)
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 #3F7B71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.033
- Teal #008080 ΔE 0.033
- Deep Aqua #08787F ΔE 0.039
- Dark Aquamarine #017371 ΔE 0.045
- Deep Turquoise #017374 ΔE 0.045
- Dark Cyan #008B8B ΔE 0.053
- Ocean #017B92 ΔE 0.057
- Battleship Gray #6C757D ΔE 0.062
Use #3F7B71 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.