#3580EE
Closest named color: Clear Blue (#247AFD). oklch(61.2% 0.182 258.4), rgb(53, 128, 238).
Aa
Black text reads best on this color (5.47:1).
About this color
#3580EE is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.182 and its hue 258°. 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 5.47:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.182) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.47:1 |
| White text | 3.83:1 |
Values
| HEX | #3580EE |
| RGB | rgb(53, 128, 238) |
| HSL | hsl(216, 84%, 57%) |
| OKLCH | oklch(61.2% 0.182 258.4) |
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 #3580EE | 3.83:1 | AA large text | Lc -70.9 | Content text, not long reading |
| Black text on #3580EE | 5.47:1 | AA | Lc 38.7 | Non-text elements, placeholder text |
| #3580EE text on white | 3.83:1 | AA large text | Lc 65.4 | Content text, not long reading |
| #3580EE text on black | 5.47:1 | AA | Lc -36.3 | 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
#E0EBFC
oklch(93.7% 0.026 259)
-
Step 200
200
#C6DBFA
oklch(88.6% 0.048 258)
-
Step 300
300
#9DC3FA
oklch(81% 0.088 257.6)
-
Step 400
400
#67A1F8
oklch(70.7% 0.142 258.3)
-
Step 500
500 (this color)
#3580EE
oklch(61.2% 0.182 258.4)
-
Step 600
600
#136DE4
oklch(55.7% 0.198 258.3)
-
Step 700
700
#025AC6
oklch(49.2% 0.184 258.4)
-
Step 800
800
#0A4AA0
oklch(42.7% 0.152 258.5)
-
Step 900
900
#133F7F
oklch(37.7% 0.119 258.5)
-
Step 950
950
#0D254A
oklch(26.9% 0.075 258.9)
#3580EE 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) | #448BF2 | 0.033 |
| Deuteranopia (no green cones) | #0D7AEC | 0.026 |
| Tritanopia (no blue cones) | #009AAB | 0.140 |
| Achromatopsia (no color) | #828282 | 0.182 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3580EE
#3580EE
oklch(61.2% 0.182 258.4)
- #AD7800
#AD7800
oklch(61.1% 0.127 77.8)
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 #3580EE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.031
- Dodger Blue #1E90FF ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.045
- Soft Blue #6488EA ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.054
- Cornflower #6A79F7 ΔE 0.055
- Royal Blue #4169E1 ΔE 0.058
- Chefchaouen Blue #4895EF ΔE 0.060
Use #3580EE 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.