#3FA59B
Closest named color: Dull Teal (#5F9E8F). oklch(66% 0.095 186.2), rgb(63, 165, 155).
Aa
Black text reads best on this color (7.06:1).
About this color
#3FA59B is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.095 and its hue 186°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Teal (#5F9E8F), ΔE 0.030 away. Black text reads best on it, at 7.06:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Dull Teal (#5F9E8F) |
| Black text | 7.06:1 |
| White text | 2.97:1 |
Values
| HEX | #3FA59B |
| RGB | rgb(63, 165, 155) |
| HSL | hsl(174, 45%, 45%) |
| OKLCH | oklch(66% 0.095 186.2) |
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 #3FA59B | 2.97:1 | Fails | Lc -61.4 | Content text, not long reading |
| Black text on #3FA59B | 7.06:1 | AAA | Lc 48.0 | Large or bold text, headings |
| #3FA59B text on white | 2.97:1 | Fails | Lc 56.0 | Large or bold text, headings |
| #3FA59B text on black | 7.06:1 | AAA | Lc -45.8 | Large or bold text, headings |
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 500.
-
Step 50
50
#F1F7F6
oklch(97.1% 0.006 185.3)
-
Step 100
100
#E1EDEB
oklch(93.7% 0.013 185.1)
-
Step 200
200
#C7DFDC
oklch(88.5% 0.026 187.6)
-
Step 300
300
#A0CBC5
oklch(81% 0.046 185.8)
-
Step 400
400
#67B0A7
oklch(70.7% 0.075 185.6)
-
Step 500
500 (this color)
#3FA59B
oklch(66% 0.095 186.2)
-
Step 600
600
#00857C
oklch(55.5% 0.097 186.5)
-
Step 700
700
#007068
oklch(49.1% 0.086 186.2)
-
Step 800
800
#005C55
oklch(42.7% 0.075 185.9)
-
Step 900
900
#0B4C47
oklch(37.7% 0.062 186.9)
-
Step 950
950
#0B2D29
oklch(27.1% 0.04 184.4)
#3FA59B 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) | #9D9C9B | 0.101 |
| Deuteranopia (no green cones) | #8D919C | 0.094 |
| Tritanopia (no blue cones) | #00A9A2 | 0.021 |
| Achromatopsia (no color) | #969696 | 0.096 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FA59B
#3FA59B
oklch(66% 0.095 186.2)
- #C47989
#C47989
oklch(66% 0.095 6.2)
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 #3FA59B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Teal #5F9E8F ΔE 0.030
- Persian Green #2A9D8F ΔE 0.031
- Cadet Blue #5F9EA0 ΔE 0.034
- Sea #3C9992 ΔE 0.035
- Grey Teal #5E9B8A ΔE 0.035
- Light Sea Green #20B2AA ΔE 0.037
- Blue Green #0F9B8E ΔE 0.042
- Greeny Blue #42B395 ΔE 0.046
Use #3FA59B 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.