#3F8FA8
Closest named color: Blue NCS (#118AB2). oklch(61.1% 0.086 221.5), rgb(63, 143, 168).
Aa
Black text reads best on this color (5.70:1).
About this color
#3F8FA8 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 61%, its chroma 0.086 and its hue 221°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.034 away. Black text reads best on it, at 5.70:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.70:1 |
| White text | 3.68:1 |
Values
| HEX | #3F8FA8 |
| RGB | rgb(63, 143, 168) |
| HSL | hsl(194, 45%, 45%) |
| OKLCH | oklch(61.1% 0.086 221.5) |
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 #3F8FA8 | 3.68:1 | AA large text | Lc -69.7 | Content text, not long reading |
| Black text on #3F8FA8 | 5.70:1 | AA | Lc 39.9 | Non-text elements, placeholder text |
| #3F8FA8 text on white | 3.68:1 | AA large text | Lc 64.2 | Content text, not long reading |
| #3F8FA8 text on black | 5.70:1 | AA | Lc -37.5 | 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
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#C9DDE4
oklch(88.5% 0.023 220.8)
-
Step 300
300
#A4C7D4
oklch(80.8% 0.042 222.4)
-
Step 400
400
#70ABBF
oklch(70.8% 0.068 221.4)
-
Step 500
500 (this color)
#3F8FA8
oklch(61.1% 0.086 221.5)
-
Step 600
600
#1F7F9A
oklch(55.5% 0.093 221.7)
-
Step 700
700
#0D6B84
oklch(49% 0.087 222.2)
-
Step 800
800
#12586B
oklch(42.8% 0.072 221)
-
Step 900
900
#194857
oklch(37.7% 0.056 222.5)
-
Step 950
950
#102A33
oklch(26.9% 0.036 223.3)
#3F8FA8 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) | #808CA9 | 0.070 |
| Deuteranopia (no green cones) | #7180A8 | 0.064 |
| Tritanopia (no blue cones) | #009797 | 0.048 |
| Achromatopsia (no color) | #858585 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F8FA8
#3F8FA8
oklch(61.1% 0.086 221.5)
- #AF725A
#AF725A
oklch(61.1% 0.085 42.2)
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 #3F8FA8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.034
- Dusty Blue #5A86AD ΔE 0.037
- Teal Blue #01889F ΔE 0.039
- Off Blue #5684AE ΔE 0.040
- Teal Green #0A9396 ΔE 0.043
- Cool Blue #4984B8 ΔE 0.046
- Steel Blue #4682B4 ΔE 0.047
- Faded Blue #658CBB ΔE 0.051
Use #3F8FA8 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.