#3F7DED
Closest named color: Clear Blue (#247AFD). oklch(60.8% 0.181 261.1), rgb(63, 125, 237).
Aa
Black text reads best on this color (5.36:1).
About this color
#3F7DED is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.181 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.031 away. Black text reads best on it, at 5.36:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.181) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.36:1 |
| White text | 3.91:1 |
Values
| HEX | #3F7DED |
| RGB | rgb(63, 125, 237) |
| HSL | hsl(219, 83%, 59%) |
| OKLCH | oklch(60.8% 0.181 261.1) |
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 #3F7DED | 3.91:1 | AA large text | Lc -71.6 | Content text, not long reading |
| Black text on #3F7DED | 5.36:1 | AA | Lc 38.0 | Non-text elements, placeholder text |
| #3F7DED text on white | 3.91:1 | AA large text | Lc 66.1 | Content text, not long reading |
| #3F7DED text on black | 5.36:1 | AA | Lc -35.5 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFC
oklch(93.5% 0.027 262.3)
-
Step 200
200
#C7DAFA
oklch(88.4% 0.049 260.9)
-
Step 300
300
#A1C2FA
oklch(81% 0.087 260.8)
-
Step 400
400
#6D9FF8
oklch(70.6% 0.142 261.2)
-
Step 500
500 (this color)
#3F7DED
oklch(60.8% 0.181 261.1)
-
Step 600
600
#276BE4
oklch(55.7% 0.196 261)
-
Step 700
700
#1A58C6
oklch(49.1% 0.183 261)
-
Step 800
800
#1849A0
oklch(42.8% 0.151 261)
-
Step 900
900
#1A3E7F
oklch(37.7% 0.118 261.1)
-
Step 950
950
#10254A
oklch(27% 0.074 260.8)
#3F7DED 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) | #3F89F1 | 0.031 |
| Deuteranopia (no green cones) | #0679EB | 0.031 |
| Tritanopia (no blue cones) | #0098AA | 0.143 |
| Achromatopsia (no color) | #818181 | 0.181 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F7DED
#3F7DED
oklch(60.8% 0.181 261.1)
- #A97900
#A97900
oklch(60.8% 0.126 80.8)
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 #3F7DED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.031
- Cornflower #6A79F7 ΔE 0.048
- Dark Sky Blue #448EE4 ΔE 0.050
- Soft Blue #6488EA ΔE 0.051
- Royal Blue #4169E1 ΔE 0.052
- Dodger Blue #1E90FF ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.052
- Chefchaouen Blue #4895EF ΔE 0.065
Use #3F7DED 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.