#3FA4A5
Closest named color: Cadet Blue (#5F9EA0). oklch(66.1% 0.092 196.1), rgb(63, 164, 165).
Aa
Black text reads best on this color (7.06:1).
About this color
#3FA4A5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.092 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.028 away. Black text reads best on it, at 7.06:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.06:1 |
| White text | 2.97:1 |
Values
| HEX | #3FA4A5 |
| RGB | rgb(63, 164, 165) |
| HSL | hsl(181, 45%, 45%) |
| OKLCH | oklch(66.1% 0.092 196.1) |
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 #3FA4A5 | 2.97:1 | Fails | Lc -61.4 | Content text, not long reading |
| Black text on #3FA4A5 | 7.06:1 | AAA | Lc 48.0 | Large or bold text, headings |
| #3FA4A5 text on white | 2.97:1 | Fails | Lc 56.0 | Large or bold text, headings |
| #3FA4A5 text on black | 7.06:1 | AAA | Lc -45.7 | 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
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E0EDED
oklch(93.6% 0.014 196.9)
-
Step 200
200
#C7DFDE
oklch(88.6% 0.026 193.6)
-
Step 300
300
#9FCACA
oklch(80.8% 0.045 196.3)
-
Step 400
400
#67AFAF
oklch(70.7% 0.072 195.6)
-
Step 500
500 (this color)
#3FA4A5
oklch(66.1% 0.092 196.1)
-
Step 600
600
#008485
oklch(55.6% 0.095 195.7)
-
Step 700
700
#006F70
oklch(49.1% 0.084 195.9)
-
Step 800
800
#005B5C
oklch(42.7% 0.073 196.1)
-
Step 900
900
#0B4B4C
oklch(37.6% 0.06 196.6)
-
Step 950
950
#0B2C2C
oklch(26.9% 0.038 195.2)
#3FA4A5 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) | #9A9DA5 | 0.096 |
| Deuteranopia (no green cones) | #8991A6 | 0.088 |
| Tritanopia (no blue cones) | #00A9A4 | 0.024 |
| Achromatopsia (no color) | #969696 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FA4A5
#3FA4A5
oklch(66.1% 0.092 196.1)
- #C47B7F
#C47B7F
oklch(66.1% 0.091 16.3)
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 #3FA4A5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.028
- Dull Teal #5F9E8F ΔE 0.036
- Sea #3C9992 ΔE 0.037
- Persian Green #2A9D8F ΔE 0.039
- Light Sea Green #20B2AA ΔE 0.039
- Grey Teal #5E9B8A ΔE 0.042
- Blue Green #0F9B8E ΔE 0.048
- Turquoise Blue #06B1C4 ΔE 0.049
Use #3FA4A5 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.