#5183FF
Closest named color: Cornflower (#6A79F7). oklch(64% 0.192 264.9), rgb(81, 131, 255).
Aa
Black text reads best on this color (6.04:1).
About this color
#5183FF is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.192 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.034 away. Black text reads best on it, at 6.04:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.192) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 6.04:1 |
| White text | 3.47:1 |
Values
| HEX | #5183FF |
| RGB | rgb(81, 131, 255) |
| HSL | hsl(223, 100%, 66%) |
| OKLCH | oklch(64% 0.192 264.9) |
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 #5183FF | 3.47:1 | AA large text | Lc -67.4 | Content text, not long reading |
| Black text on #5183FF | 6.04:1 | AA | Lc 42.1 | Non-text elements, placeholder text |
| #5183FF text on white | 3.47:1 | AA large text | Lc 61.9 | Content text, not long reading |
| #5183FF text on black | 6.04:1 | AA | Lc -39.8 | 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
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C8D9FD
oklch(88.4% 0.053 265.3)
-
Step 300
300
#A3C0FE
oklch(80.9% 0.094 265)
-
Step 400
400
#729DFE
oklch(70.8% 0.15 264.8)
-
Step 500
500 (this color)
#5183FF
oklch(64% 0.192 264.9)
-
Step 600
600
#3566EB
oklch(55.7% 0.208 264.9)
-
Step 700
700
#2853CD
oklch(49.1% 0.195 265)
-
Step 800
800
#2245A5
oklch(42.7% 0.16 265)
-
Step 900
900
#203B83
oklch(37.6% 0.126 265.3)
-
Step 950
950
#13234D
oklch(26.9% 0.08 265.6)
#5183FF 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) | #3D92FF | 0.038 |
| Deuteranopia (no green cones) | #0082FC | 0.042 |
| Tritanopia (no blue cones) | #00A0B5 | 0.155 |
| Achromatopsia (no color) | #898989 | 0.192 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5183FF
#5183FF
oklch(64% 0.192 264.9)
- #B08400
#B08400
oklch(63.9% 0.131 84.9)
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 #5183FF, closest first.
No curated palette has a color within ΔE 0.04 of #5183FF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.034
- Soft Blue #6488EA ΔE 0.041
- Dodger Blue #1E90FF ΔE 0.041
- Clear Blue #247AFD ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.054
- Chefchaouen Blue #4895EF ΔE 0.055
- Cornflower Blue #6495ED ΔE 0.063
- Lavender Blue #8B88F8 ΔE 0.073
Use #5183FF 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.