#6399F7
Closest named color: Cornflower Blue (#6495ED). oklch(68.8% 0.151 260.8), rgb(99, 153, 247).
Aa
Black text reads best on this color (7.43:1).
About this color
#6399F7 is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.151 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.016 away. Black text reads best on it, at 7.43:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.43:1 |
| White text | 2.82:1 |
Values
| HEX | #6399F7 |
| RGB | rgb(99, 153, 247) |
| HSL | hsl(218, 90%, 68%) |
| OKLCH | oklch(68.8% 0.151 260.8) |
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 #6399F7 | 2.82:1 | Fails | Lc -59.3 | Large or bold text, headings |
| Black text on #6399F7 | 7.43:1 | AAA | Lc 50.0 | Large or bold text, headings |
| #6399F7 text on white | 2.82:1 | Fails | Lc 54.0 | Large or bold text, headings |
| #6399F7 text on black | 7.43:1 | AAA | Lc -47.8 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EBFD
oklch(93.7% 0.027 260.3)
-
Step 200
200
#C6DAFD
oklch(88.5% 0.053 261.7)
-
Step 300
300
#9EC2FE
oklch(81% 0.094 260.4)
-
Step 400
400 (this color)
#6399F7
oklch(68.8% 0.151 260.8)
-
Step 500
500
#3F83FC
oklch(63.1% 0.193 260.9)
-
Step 600
600
#1E69EB
oklch(55.6% 0.209 260.9)
-
Step 700
700
#1056CC
oklch(49% 0.195 260.9)
-
Step 800
800
#1147A5
oklch(42.6% 0.162 260.9)
-
Step 900
900
#163D83
oklch(37.7% 0.126 261)
-
Step 950
950
#0E254D
oklch(27.2% 0.079 260.6)
#6399F7 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) | #71A1FB | 0.028 |
| Deuteranopia (no green cones) | #5C93F5 | 0.018 |
| Tritanopia (no blue cones) | #00AEBC | 0.129 |
| Achromatopsia (no color) | #9A9A9A | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6399F7
#6399F7
oklch(68.8% 0.151 260.8)
- #C78F00
#C78F00
oklch(68.7% 0.142 80.7)
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 #6399F7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.016
- Chefchaouen Blue #4895EF ΔE 0.031
- Soft Blue #6488EA ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.051
- Periwinkle Blue #8F99FB ΔE 0.052
- Dodger Blue #1E90FF ΔE 0.058
- Perrywinkle #8F8CE7 ΔE 0.060
- Lavender Blue #8B88F8 ΔE 0.060
Use #6399F7 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.