#6390EF
Closest named color: Cornflower Blue (#6495ED). oklch(66.5% 0.15 263.7), rgb(99, 144, 239).
Aa
Black text reads best on this color (6.76:1).
About this color
#6390EF is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.150 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.014 away. Black text reads best on it, at 6.76:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.150) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.76:1 |
| White text | 3.10:1 |
Values
| HEX | #6390EF |
| RGB | rgb(99, 144, 239) |
| HSL | hsl(221, 81%, 66%) |
| OKLCH | oklch(66.5% 0.15 263.7) |
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 #6390EF | 3.10:1 | AA large text | Lc -63.2 | Content text, not long reading |
| Black text on #6390EF | 6.76:1 | AA | Lc 46.3 | Large or bold text, headings |
| #6390EF text on white | 3.10:1 | AA large text | Lc 57.8 | Large or bold text, headings |
| #6390EF text on black | 6.76:1 | AA | Lc -43.9 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF9
oklch(93.6% 0.022 265.8)
-
Step 200
200
#CBDAF5
oklch(88.6% 0.041 262.3)
-
Step 300
300
#A8C1F1
oklch(80.9% 0.074 263.3)
-
Step 400
400
#7B9FEA
oklch(70.7% 0.118 264.1)
-
Step 500
500 (this color)
#6390EF
oklch(66.5% 0.15 263.7)
-
Step 600
600
#406DD1
oklch(55.6% 0.162 263.7)
-
Step 700
700
#325AB5
oklch(49% 0.151 263.8)
-
Step 800
800
#2A4A93
oklch(42.7% 0.126 264)
-
Step 900
900
#263F75
oklch(37.8% 0.097 263.7)
-
Step 950
950
#162544
oklch(26.9% 0.061 263.4)
#6390EF 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) | #6799F3 | 0.025 |
| Deuteranopia (no green cones) | #548CED | 0.020 |
| Tritanopia (no blue cones) | #00A5B4 | 0.131 |
| Achromatopsia (no color) | #929292 | 0.150 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6390EF
#6390EF
oklch(66.5% 0.15 263.7)
- #BB8B00
#BB8B00
oklch(66.5% 0.137 84)
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 #6390EF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.014
- Soft Blue #6488EA ΔE 0.021
- Chefchaouen Blue #4895EF ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.035
- Dodger Blue #1E90FF ΔE 0.052
- Lavender Blue #8B88F8 ΔE 0.054
- Perrywinkle #8F8CE7 ΔE 0.055
- Cornflower #6A79F7 ΔE 0.061
Use #6390EF 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.