#3F9BAD
Closest named color: Cadet Blue (#5F9EA0). oklch(64.2% 0.09 212.7), rgb(63, 155, 173).
Aa
Black text reads best on this color (6.50:1).
About this color
#3F9BAD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 64%, its chroma 0.090 and its hue 213°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.035 away. Black text reads best on it, at 6.50:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.50:1 |
| White text | 3.22:1 |
Values
| HEX | #3F9BAD |
| RGB | rgb(63, 155, 173) |
| HSL | hsl(190, 47%, 46%) |
| OKLCH | oklch(64.2% 0.09 212.7) |
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 #3F9BAD | 3.22:1 | AA large text | Lc -64.7 | Content text, not long reading |
| Black text on #3F9BAD | 6.50:1 | AA | Lc 44.8 | Non-text elements, placeholder text |
| #3F9BAD text on white | 3.22:1 | AA large text | Lc 59.3 | Large or bold text, headings |
| #3F9BAD text on black | 6.50:1 | AA | Lc -42.4 | Non-text elements, placeholder text |
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
#E1ECEF
oklch(93.6% 0.012 215.8)
-
Step 200
200
#C8DEE3
oklch(88.6% 0.024 212.9)
-
Step 300
300
#A1C9D1
oklch(81% 0.044 211.2)
-
Step 400
400
#6BACBB
oklch(70.6% 0.07 214)
-
Step 500
500 (this color)
#3F9BAD
oklch(64.2% 0.09 212.7)
-
Step 600
600
#008295
oklch(55.7% 0.097 212.5)
-
Step 700
700
#006D7D
oklch(49.1% 0.086 212.3)
-
Step 800
800
#005967
oklch(42.6% 0.075 213)
-
Step 900
900
#114A54
oklch(37.8% 0.059 212)
-
Step 950
950
#0D2B31
oklch(27% 0.037 212.9)
#3F9BAD 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) | #8D96AE | 0.082 |
| Deuteranopia (no green cones) | #7D8AAD | 0.075 |
| Tritanopia (no blue cones) | #00A2A0 | 0.040 |
| Achromatopsia (no color) | #8F8F8F | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F9BAD
#3F9BAD
oklch(64.2% 0.09 212.7)
- #BD7869
#BD7869
oklch(64.2% 0.09 32.9)
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 #3F9BAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.035
- Sea #3C9992 ΔE 0.041
- Teal Green #0A9396 ΔE 0.048
- Persian Green #2A9D8F ΔE 0.052
- Dull Teal #5F9E8F ΔE 0.053
- Blue Green #0F9B8E ΔE 0.056
- Grey Teal #5E9B8A ΔE 0.056
- Dusty Teal #4C9085 ΔE 0.059
Use #3F9BAD 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.