#3F9BCD
Closest named color: Faded Blue (#658CBB). oklch(65.6% 0.114 236.1), rgb(63, 155, 205).
Aa
Black text reads best on this color (6.78:1).
About this color
#3F9BCD is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.114 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.050 away. Black text reads best on it, at 6.78:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.78:1 |
| White text | 3.09:1 |
Values
| HEX | #3F9BCD |
| RGB | rgb(63, 155, 205) |
| HSL | hsl(201, 59%, 53%) |
| OKLCH | oklch(65.6% 0.114 236.1) |
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 #3F9BCD | 3.09:1 | AA large text | Lc -63.0 | Content text, not long reading |
| Black text on #3F9BCD | 6.78:1 | AA | Lc 46.4 | Large or bold text, headings |
| #3F9BCD text on white | 3.09:1 | AA large text | Lc 57.6 | Large or bold text, headings |
| #3F9BCD text on black | 6.78:1 | AA | Lc -44.1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF3
oklch(93.6% 0.016 233)
-
Step 200
200
#C7DDEB
oklch(88.6% 0.03 235.7)
-
Step 300
300
#9FC7E0
oklch(80.9% 0.055 235.8)
-
Step 400
400
#67A9D1
oklch(70.6% 0.089 236.5)
-
Step 500
500 (this color)
#3F9BCD
oklch(65.6% 0.114 236.1)
-
Step 600
600
#007CB0
oklch(55.5% 0.121 236.7)
-
Step 700
700
#006994
oklch(49.2% 0.105 235.5)
-
Step 800
800
#00567A
oklch(42.8% 0.091 235.4)
-
Step 900
900
#0D4763
oklch(37.7% 0.074 235.5)
-
Step 950
950
#0B2A3A
oklch(27.1% 0.047 234.9)
#3F9BCD 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) | #839ACF | 0.067 |
| Deuteranopia (no green cones) | #708CCC | 0.057 |
| Tritanopia (no blue cones) | #00A8AC | 0.075 |
| Achromatopsia (no color) | #929292 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F9BCD
#3F9BCD
oklch(65.6% 0.114 236.1)
- #C57D47
#C57D47
oklch(65.5% 0.114 56)
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 #3F9BCD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.056
- Chefchaouen Blue #4895EF ΔE 0.059
- Cornflower Blue #6495ED ΔE 0.065
- Cool Blue #4984B8 ΔE 0.065
- Water Blue #0E87CC ΔE 0.065
- Blue NCS #118AB2 ΔE 0.066
- Dusty Blue #5A86AD ΔE 0.066
Use #3F9BCD 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.