#3F8CA4
Closest named color: Blue NCS (#118AB2). oklch(60.2% 0.083 221.3), rgb(63, 140, 164).
Aa
Black text reads best on this color (5.49:1).
About this color
#3F8CA4 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 60%, its chroma 0.083 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.032 away. Black text reads best on it, at 5.49:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.49:1 |
| White text | 3.81:1 |
Values
| HEX | #3F8CA4 |
| RGB | rgb(63, 140, 164) |
| HSL | hsl(194, 44%, 45%) |
| OKLCH | oklch(60.2% 0.083 221.3) |
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 #3F8CA4 | 3.81:1 | AA large text | Lc -71.0 | Content text, not long reading |
| Black text on #3F8CA4 | 5.49:1 | AA | Lc 38.6 | Non-text elements, placeholder text |
| #3F8CA4 text on white | 3.81:1 | AA large text | Lc 65.5 | Content text, not long reading |
| #3F8CA4 text on black | 5.49:1 | AA | Lc -36.2 | 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
#CADDE4
oklch(88.5% 0.023 221.8)
-
Step 300
300
#A5C7D3
oklch(80.9% 0.04 221.2)
-
Step 400
400
#72AABE
oklch(70.6% 0.065 222.4)
-
Step 500
500 (this color)
#3F8CA4
oklch(60.2% 0.083 221.3)
-
Step 600
600
#247F99
oklch(55.6% 0.091 221.5)
-
Step 700
700
#146B82
oklch(49% 0.084 221)
-
Step 800
800
#16576A
oklch(42.6% 0.07 221.9)
-
Step 900
900
#1B4856
oklch(37.7% 0.054 221.6)
-
Step 950
950
#112A32
oklch(26.9% 0.034 221.3)
#3F8CA4 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) | #7E89A5 | 0.069 |
| Deuteranopia (no green cones) | #6F7EA4 | 0.061 |
| Tritanopia (no blue cones) | #009494 | 0.047 |
| Achromatopsia (no color) | #828282 | 0.084 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F8CA4
#3F8CA4
oklch(60.2% 0.083 221.3)
- #AB7059
#AB7059
oklch(60.2% 0.083 42.1)
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 #3F8CA4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.032
- Teal Blue #01889F ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.035
- Off Blue #5684AE ΔE 0.037
- Teal Green #0A9396 ΔE 0.042
- Steel Blue #4682B4 ΔE 0.044
- Cool Blue #4984B8 ΔE 0.045
- Stormy Blue #507B9C ΔE 0.048
Use #3F8CA4 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.