#6583FF
Closest named color: Cornflower (#6A79F7). oklch(65% 0.186 270.3), rgb(101, 131, 255).
Aa
Black text reads best on this color (6.24:1).
About this color
#6583FF is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.186 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.026 away. Black text reads best on it, at 6.24:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 6.24:1 |
| White text | 3.36:1 |
Values
| HEX | #6583FF |
| RGB | rgb(101, 131, 255) |
| HSL | hsl(228, 100%, 70%) |
| OKLCH | oklch(65% 0.186 270.3) |
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 #6583FF | 3.36:1 | AA large text | Lc -66.2 | Content text, not long reading |
| Black text on #6583FF | 6.24:1 | AA | Lc 43.3 | Non-text elements, placeholder text |
| #6583FF text on white | 3.36:1 | AA large text | Lc 60.8 | Content text, not long reading |
| #6583FF text on black | 6.24:1 | AA | Lc -40.9 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CCD8FC
oklch(88.5% 0.051 270.8)
-
Step 300
300
#AABEFC
oklch(80.9% 0.091 270.5)
-
Step 400
400
#7E9AFB
oklch(70.7% 0.146 270.2)
-
Step 500
500 (this color)
#6583FF
oklch(65% 0.186 270.3)
-
Step 600
600
#4962E7
oklch(55.5% 0.202 270.3)
-
Step 700
700
#3B50C9
oklch(49% 0.188 270.3)
-
Step 800
800
#3143A3
oklch(42.8% 0.156 270.4)
-
Step 900
900
#2A3A81
oklch(37.8% 0.121 270.1)
-
Step 950
950
#18224C
oklch(26.9% 0.079 270.3)
#6583FF 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) | #4293FF | 0.047 |
| Deuteranopia (no green cones) | #2186FC | 0.053 |
| Tritanopia (no blue cones) | #009FB5 | 0.159 |
| Achromatopsia (no color) | #8C8C8C | 0.187 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6583FF
#6583FF
oklch(65% 0.186 270.3)
- #AE8A00
#AE8A00
oklch(64.9% 0.133 90.1)
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 #6583FF, closest first.
No curated palette has a color within ΔE 0.04 of #6583FF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.026
- Soft Blue #6488EA ΔE 0.036
- Lavender Blue #8B88F8 ΔE 0.053
- Periwinkle #8E82FE ΔE 0.054
- Dodger Blue #1E90FF ΔE 0.056
- Cornflower Blue #6495ED ΔE 0.057
- Chefchaouen Blue #4895EF ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.061
Use #6583FF 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.