#3F8DAD
Closest named color: Blue NCS (#118AB2). oklch(60.8% 0.09 228), rgb(63, 141, 173).
Aa
Black text reads best on this color (5.62:1).
About this color
#3F8DAD is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 61%, its chroma 0.090 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.027 away. Black text reads best on it, at 5.62:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.62:1 |
| White text | 3.73:1 |
Values
| HEX | #3F8DAD |
| RGB | rgb(63, 141, 173) |
| HSL | hsl(197, 47%, 46%) |
| OKLCH | oklch(60.8% 0.09 228) |
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 #3F8DAD | 3.73:1 | AA large text | Lc -70.2 | Content text, not long reading |
| Black text on #3F8DAD | 5.62:1 | AA | Lc 39.4 | Non-text elements, placeholder text |
| #3F8DAD text on white | 3.73:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #3F8DAD text on black | 5.62:1 | AA | Lc -37.0 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2ECF1
oklch(93.7% 0.013 228.9)
-
Step 200
200
#C9DDE6
oklch(88.5% 0.025 226.5)
-
Step 300
300
#A4C7D7
oklch(80.9% 0.044 227.3)
-
Step 400
400
#70AAC3
oklch(70.7% 0.071 227)
-
Step 500
500 (this color)
#3F8DAD
oklch(60.8% 0.09 228)
-
Step 600
600
#217EA0
oklch(55.6% 0.098 227.8)
-
Step 700
700
#106A89
oklch(49.1% 0.091 228)
-
Step 800
800
#13576F
oklch(42.8% 0.075 227)
-
Step 900
900
#19485A
oklch(37.8% 0.059 226.9)
-
Step 950
950
#102A35
oklch(27% 0.038 228.2)
#3F8DAD 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) | #7C8BAF | 0.066 |
| Deuteranopia (no green cones) | #6D7FAD | 0.058 |
| Tritanopia (no blue cones) | #009697 | 0.056 |
| Achromatopsia (no color) | #848484 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F8DAD
#3F8DAD
oklch(60.8% 0.09 228)
- #AF7252
#AF7252
oklch(60.9% 0.09 48.2)
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 #3F8DAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.027
- Dusty Blue #5A86AD ΔE 0.030
- Off Blue #5684AE ΔE 0.031
- Cool Blue #4984B8 ΔE 0.036
- Steel Blue #4682B4 ΔE 0.037
- Teal Blue #01889F ΔE 0.039
- Faded Blue #658CBB ΔE 0.045
- Stormy Blue #507B9C ΔE 0.051
Use #3F8DAD 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.