#3FA2B9
Closest named color: Cadet Blue (#5F9EA0). oklch(66.4% 0.096 216), rgb(63, 162, 185).
Aa
Black text reads best on this color (7.08:1).
About this color
#3FA2B9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.096 and its hue 216°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.040 away. Black text reads best on it, at 7.08:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 7.08:1 |
| White text | 2.96:1 |
Values
| HEX | #3FA2B9 |
| RGB | rgb(63, 162, 185) |
| HSL | hsl(191, 49%, 49%) |
| OKLCH | oklch(66.4% 0.096 216) |
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 #3FA2B9 | 2.96:1 | Fails | Lc -61.3 | Content text, not long reading |
| Black text on #3FA2B9 | 7.08:1 | AAA | Lc 48.1 | Large or bold text, headings |
| #3FA2B9 text on white | 2.96:1 | Fails | Lc 55.9 | Large or bold text, headings |
| #3FA2B9 text on black | 7.08:1 | 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
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0ECF0
oklch(93.5% 0.014 219.6)
-
Step 200
200
#C7DEE4
oklch(88.5% 0.026 215.2)
-
Step 300
300
#9FC9D4
oklch(80.9% 0.047 215.5)
-
Step 400
400
#66ADBF
oklch(70.8% 0.076 215.9)
-
Step 500
500 (this color)
#3FA2B9
oklch(66.4% 0.096 216)
-
Step 600
600
#008198
oklch(55.6% 0.099 216.1)
-
Step 700
700
#006C80
oklch(49% 0.087 216.4)
-
Step 800
800
#005969
oklch(42.7% 0.076 215.4)
-
Step 900
900
#0A4A57
oklch(37.8% 0.063 215.6)
-
Step 950
950
#0A2B33
oklch(26.9% 0.04 217)
#3FA2B9 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) | #929DBA | 0.085 |
| Deuteranopia (no green cones) | #8190B9 | 0.078 |
| Tritanopia (no blue cones) | #00AAA9 | 0.044 |
| Achromatopsia (no color) | #969696 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3FA2B9
#3FA2B9
oklch(66.4% 0.096 216)
- #C77E6A
#C77E6A
oklch(66.5% 0.096 36.1)
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 #3FA2B9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.040
- Turquoise Blue #06B1C4 ΔE 0.042
- Greyblue #77A1B5 ΔE 0.050
- Sea #3C9992 ΔE 0.059
- Light Sea Green #20B2AA ΔE 0.059
- Dull Teal #5F9E8F ΔE 0.062
- Persian Green #2A9D8F ΔE 0.065
- Grey Teal #5E9B8A ΔE 0.067
Use #3FA2B9 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.