#6391FF
Closest named color: Cornflower Blue (#6495ED). oklch(67.6% 0.17 265.1), rgb(99, 145, 255).
Aa
Black text reads best on this color (7.02:1).
About this color
#6391FF is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.170 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.031 away. Black text reads best on it, at 7.02:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.02:1 |
| White text | 2.98:1 |
Values
| HEX | #6391FF |
| RGB | rgb(99, 145, 255) |
| HSL | hsl(222, 100%, 69%) |
| OKLCH | oklch(67.6% 0.17 265.1) |
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 #6391FF | 2.98:1 | Fails | Lc -61.6 | Content text, not long reading |
| Black text on #6391FF | 7.02:1 | AAA | Lc 47.8 | Large or bold text, headings |
| #6391FF text on white | 2.98:1 | Fails | Lc 56.3 | Large or bold text, headings |
| #6391FF text on black | 7.02:1 | AAA | Lc -45.5 | Large or bold text, headings |
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 400.
-
Step 50
50
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7D9FF
oklch(88.4% 0.056 265.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400 (this color)
#6391FF
oklch(67.6% 0.17 265.1)
-
Step 500
500
#4D7FFF
oklch(63% 0.198 265.1)
-
Step 600
600
#2D60FB
oklch(55.6% 0.237 265.1)
-
Step 700
700
#214EDA
oklch(49.1% 0.219 265)
-
Step 800
800
#1C41B0
oklch(42.7% 0.181 265)
-
Step 900
900
#1B398B
oklch(37.7% 0.141 265)
-
Step 950
950
#102252
oklch(27% 0.091 265.2)
#6391FF 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) | #5E9DFF | 0.031 |
| Deuteranopia (no green cones) | #468FFD | 0.028 |
| Tritanopia (no blue cones) | #00AABC | 0.145 |
| Achromatopsia (no color) | #959595 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6391FF
#6391FF
oklch(67.6% 0.17 265.1)
- #BE8F00
#BE8F00
oklch(67.7% 0.139 85.1)
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 #6391FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.031
- Soft Blue #6488EA ΔE 0.036
- Chefchaouen Blue #4895EF ΔE 0.037
- Dodger Blue #1E90FF ΔE 0.049
- Lavender Blue #8B88F8 ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.052
- Cornflower #6A79F7 ΔE 0.059
- Periwinkle Blue #8F99FB ΔE 0.060
Use #6391FF 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.