#3683FF
Closest named color: Clear Blue (#247AFD). oklch(63% 0.2 259.7), rgb(54, 131, 255).
Aa
Black text reads best on this color (5.84:1).
About this color
#3683FF is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.200 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.027 away. Black text reads best on it, at 5.84:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.200) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.84:1 |
| White text | 3.59:1 |
Values
| HEX | #3683FF |
| RGB | rgb(54, 131, 255) |
| HSL | hsl(217, 100%, 61%) |
| OKLCH | oklch(63% 0.2 259.7) |
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 #3683FF | 3.59:1 | AA large text | Lc -68.5 | Content text, not long reading |
| Black text on #3683FF | 5.84:1 | AA | Lc 41.1 | Non-text elements, placeholder text |
| #3683FF text on white | 3.59:1 | AA large text | Lc 63.0 | Content text, not long reading |
| #3683FF text on black | 5.84:1 | AA | Lc -38.7 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C4DBFE
oklch(88.6% 0.054 258.7)
-
Step 300
300
#9CC2FF
oklch(80.9% 0.096 259.7)
-
Step 400
400
#659FFF
oklch(70.6% 0.154 260)
-
Step 500
500 (this color)
#3683FF
oklch(63% 0.2 259.7)
-
Step 600
600
#0A69EF
oklch(55.7% 0.217 259.7)
-
Step 700
700
#0057CD
oklch(49.1% 0.196 259.6)
-
Step 800
800
#0447A8
oklch(42.6% 0.168 259.8)
-
Step 900
900
#103D85
oklch(37.7% 0.13 259.9)
-
Step 950
950
#0B254E
oklch(27.1% 0.082 259.4)
#3683FF 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) | #3891FF | 0.036 |
| Deuteranopia (no green cones) | #007EFD | 0.026 |
| Tritanopia (no blue cones) | #00A1B5 | 0.154 |
| Achromatopsia (no color) | #878787 | 0.200 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3683FF
#3683FF
oklch(63% 0.2 259.7)
- #B27E00
#B27E00
oklch(62.9% 0.13 79.6)
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 #3683FF, closest first.
No curated palette has a color within ΔE 0.04 of #3683FF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.027
- Dodger Blue #1E90FF ΔE 0.033
- Cornflower #6A79F7 ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.055
- Soft Blue #6488EA ΔE 0.055
- Chefchaouen Blue #4895EF ΔE 0.059
- Cerulean Blue #056EEE ΔE 0.065
- Cornflower Blue #6495ED ΔE 0.074
Use #3683FF 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.