#3F9BB6
Closest named color: Cadet Blue (#5F9EA0). oklch(64.6% 0.095 220.6), rgb(63, 155, 182).
Aa
Black text reads best on this color (6.57:1).
About this color
#3F9BB6 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 65%, its chroma 0.095 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.044 away. Black text reads best on it, at 6.57:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.57:1 |
| White text | 3.19:1 |
Values
| HEX | #3F9BB6 |
| RGB | rgb(63, 155, 182) |
| HSL | hsl(194, 49%, 48%) |
| OKLCH | oklch(64.6% 0.095 220.6) |
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 #3F9BB6 | 3.19:1 | AA large text | Lc -64.3 | Content text, not long reading |
| Black text on #3F9BB6 | 6.57:1 | AA | Lc 45.2 | Large or bold text, headings |
| #3F9BB6 text on white | 3.19:1 | AA large text | Lc 58.9 | Large or bold text, headings |
| #3F9BB6 text on black | 6.57:1 | AA | Lc -42.9 | 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
#F1F6F8
oklch(97% 0.006 223.5)
-
Step 100
100
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C8DDE5
oklch(88.4% 0.025 222.6)
-
Step 300
300
#A0C8D6
oklch(80.9% 0.047 221.2)
-
Step 400
400
#6AACC1
oklch(70.8% 0.074 220.3)
-
Step 500
500 (this color)
#3F9BB6
oklch(64.6% 0.095 220.6)
-
Step 600
600
#00809D
oklch(55.6% 0.102 221.1)
-
Step 700
700
#006C84
oklch(49.2% 0.09 220.2)
-
Step 800
800
#00586D
oklch(42.6% 0.078 221.3)
-
Step 900
900
#104958
oklch(37.7% 0.061 219.8)
-
Step 950
950
#0C2B34
oklch(27.1% 0.04 220.3)
#3F9BB6 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) | #8B97B7 | 0.079 |
| Deuteranopia (no green cones) | #7A8BB6 | 0.070 |
| Tritanopia (no blue cones) | #00A4A4 | 0.049 |
| Achromatopsia (no color) | #909090 | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F9BB6
#3F9BB6
oklch(64.6% 0.095 220.6)
- #BF7A61
#BF7A61
oklch(64.6% 0.094 40.7)
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 #3F9BB6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.044
- Faded Blue #658CBB ΔE 0.054
- Sea #3C9992 ΔE 0.055
- Greyblue #77A1B5 ΔE 0.058
- Blue NCS #118AB2 ΔE 0.058
- Teal Green #0A9396 ΔE 0.059
- Dusty Blue #5A86AD ΔE 0.059
- Blue Grey #758DA3 ΔE 0.060
Use #3F9BB6 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.