#3F8A9D
Closest named color: Teal Blue (#01889F). oklch(59.4% 0.079 216.9), rgb(63, 138, 157).
Aa
Black text reads best on this color (5.33:1).
About this color
#3F8A9D is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.079 and its hue 217°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.028 away. Black text reads best on it, at 5.33:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.33:1 |
| White text | 3.93:1 |
Values
| HEX | #3F8A9D |
| RGB | rgb(63, 138, 157) |
| HSL | hsl(192, 43%, 43%) |
| OKLCH | oklch(59.4% 0.079 216.9) |
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 #3F8A9D | 3.93:1 | AA large text | Lc -72.1 | Content text, not long reading |
| Black text on #3F8A9D | 5.33:1 | AA | Lc 37.5 | Non-text elements, placeholder text |
| #3F8A9D text on white | 3.93:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #3F8A9D text on black | 5.33:1 | AA | Lc -35.1 | 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECEF
oklch(93.6% 0.011 217.5)
-
Step 200
200
#CADDE2
oklch(88.5% 0.022 215.3)
-
Step 300
300
#A5C7D1
oklch(80.8% 0.039 217.5)
-
Step 400
400
#73ABBA
oklch(70.8% 0.062 216.4)
-
Step 500
500 (this color)
#3F8A9D
oklch(59.4% 0.079 216.9)
-
Step 600
600
#287F94
oklch(55.5% 0.086 217.4)
-
Step 700
700
#196C7E
oklch(49.2% 0.08 216.2)
-
Step 800
800
#195866
oklch(42.8% 0.066 215.8)
-
Step 900
900
#1C4853
oklch(37.6% 0.051 216.8)
-
Step 950
950
#122A31
oklch(26.9% 0.033 219.1)
#3F8A9D 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) | #7D869E | 0.069 |
| Deuteranopia (no green cones) | #6F7C9D | 0.062 |
| Tritanopia (no blue cones) | #009190 | 0.042 |
| Achromatopsia (no color) | #808080 | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F8A9D
#3F8A9D
oklch(59.4% 0.079 216.9)
- #A86D5D
#A86D5D
oklch(59.3% 0.08 35.9)
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 #3F8A9D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.028
- Blue NCS #118AB2 ΔE 0.038
- Teal Green #0A9396 ΔE 0.038
- Dusty Blue #5A86AD ΔE 0.041
- Off Blue #5684AE ΔE 0.042
- Dark Cyan #008B8B ΔE 0.043
- Cerulean #457B9D ΔE 0.045
- Stormy Blue #507B9C ΔE 0.045
Use #3F8A9D 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.