#3F8BAA
Closest named color: Blue NCS (#118AB2). oklch(60.2% 0.088 227.8), rgb(63, 139, 170).
Aa
Black text reads best on this color (5.48:1).
About this color
#3F8BAA is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 60%, its chroma 0.088 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.026 away. Black text reads best on it, at 5.48:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.48:1 |
| White text | 3.82:1 |
Values
| HEX | #3F8BAA |
| RGB | rgb(63, 139, 170) |
| HSL | hsl(197, 46%, 46%) |
| OKLCH | oklch(60.2% 0.088 227.8) |
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 #3F8BAA | 3.82:1 | AA large text | Lc -71.1 | Content text, not long reading |
| Black text on #3F8BAA | 5.48:1 | AA | Lc 38.5 | Non-text elements, placeholder text |
| #3F8BAA text on white | 3.82:1 | AA large text | Lc 65.6 | Content text, not long reading |
| #3F8BAA text on black | 5.48:1 | AA | Lc -36.1 | 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
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CADDE6
oklch(88.6% 0.024 227.8)
-
Step 300
300
#A4C7D7
oklch(80.9% 0.044 227.3)
-
Step 400
400
#72AAC3
oklch(70.8% 0.069 227.8)
-
Step 500
500 (this color)
#3F8BAA
oklch(60.2% 0.088 227.8)
-
Step 600
600
#247E9F
oklch(55.6% 0.096 227.4)
-
Step 700
700
#156A88
oklch(49.1% 0.089 227.7)
-
Step 800
800
#16576F
oklch(42.9% 0.074 227.6)
-
Step 900
900
#1B4759
oklch(37.6% 0.057 228.1)
-
Step 950
950
#112A34
oklch(27% 0.036 226.6)
#3F8BAA 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) | #7B89AC | 0.065 |
| Deuteranopia (no green cones) | #6C7DAA | 0.058 |
| Tritanopia (no blue cones) | #009495 | 0.055 |
| Achromatopsia (no color) | #828282 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F8BAA
#3F8BAA
oklch(60.2% 0.088 227.8)
- #AC7051
#AC7051
oklch(60.2% 0.088 47.8)
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 #3F8BAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.026
- Dusty Blue #5A86AD ΔE 0.029
- Off Blue #5684AE ΔE 0.030
- Steel Blue #4682B4 ΔE 0.034
- Cool Blue #4984B8 ΔE 0.035
- Teal Blue #01889F ΔE 0.035
- Cerulean #457B9D ΔE 0.046
- Stormy Blue #507B9C ΔE 0.046
Use #3F8BAA 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.