#3F9BED
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.3% 0.149 248.9), rgb(63, 155, 237).
Aa
Black text reads best on this color (7.12:1).
About this color
#3F9BED is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.149 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.017 away. Black text reads best on it, at 7.12:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.12:1 |
| White text | 2.94:1 |
Values
| HEX | #3F9BED |
| RGB | rgb(63, 155, 237) |
| HSL | hsl(208, 83%, 59%) |
| OKLCH | oklch(67.3% 0.149 248.9) |
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 #3F9BED | 2.94:1 | Fails | Lc -60.9 | Content text, not long reading |
| Black text on #3F9BED | 7.12:1 | AAA | Lc 48.4 | Large or bold text, headings |
| #3F9BED text on white | 2.94:1 | Fails | Lc 55.6 | Large or bold text, headings |
| #3F9BED text on black | 7.12:1 | AAA | Lc -46.2 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF6FE
oklch(97% 0.013 251.6)
-
Step 100
100
#DDECFC
oklch(93.7% 0.027 249.9)
-
Step 200
200
#BFDDFB
oklch(88.5% 0.052 248.4)
-
Step 300
300
#91C6FB
oklch(80.9% 0.094 249)
-
Step 400
400 (this color)
#3F9BED
oklch(67.3% 0.149 248.9)
-
Step 500
500
#008DEC
oklch(63.1% 0.173 248.9)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#004375
oklch(37.5% 0.104 249)
-
Step 950
950
#002849
oklch(27.1% 0.074 248.8)
#3F9BED 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) | #759FF0 | 0.052 |
| Deuteranopia (no green cones) | #5C8FEB | 0.036 |
| Tritanopia (no blue cones) | #00AFB9 | 0.111 |
| Achromatopsia (no color) | #969696 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F9BED
#3F9BED
oklch(67.3% 0.149 248.9)
- #CF8200
#CF8200
oklch(67.2% 0.147 68.7)
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 #3F9BED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.017
- Cornflower Blue #6495ED ΔE 0.033
- Dark Sky Blue #448EE4 ΔE 0.035
- Dodger Blue #1E90FF ΔE 0.047
- Soft Blue #6488EA ΔE 0.054
- Water Blue #0E87CC ΔE 0.076
- Faded Blue #658CBB ΔE 0.079
- Periwinkle Blue #8F99FB ΔE 0.085
Use #3F9BED 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.