#6397DC
Closest named color: Cornflower Blue (#6495ED). oklch(66.9% 0.117 255.9), rgb(99, 151, 220).
Aa
Black text reads best on this color (6.99:1).
About this color
#6397DC is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.117 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.027 away. Black text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.99:1 |
| White text | 3.00:1 |
Values
| HEX | #6397DC |
| RGB | rgb(99, 151, 220) |
| HSL | hsl(214, 63%, 63%) |
| OKLCH | oklch(66.9% 0.117 255.9) |
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 #6397DC | 3.00:1 | AA large text | Lc -61.9 | Content text, not long reading |
| Black text on #6397DC | 6.99:1 | AA | Lc 47.5 | Large or bold text, headings |
| #6397DC text on white | 3.00:1 | AA large text | Lc 56.6 | Large or bold text, headings |
| #6397DC text on black | 6.99:1 | AA | Lc -45.2 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A2C3F0
oklch(80.9% 0.073 256.2)
-
Step 400
400 (this color)
#6397DC
oklch(66.9% 0.117 255.9)
-
Step 500
500
#468AE2
oklch(63.1% 0.15 255.9)
-
Step 600
600
#2472D0
oklch(55.7% 0.163 255.8)
-
Step 700
700
#165FB4
oklch(49.1% 0.151 255.8)
-
Step 800
800
#164E92
oklch(42.8% 0.126 255.9)
-
Step 900
900
#1A4174
oklch(37.6% 0.098 256.3)
-
Step 950
950
#102744
oklch(27.1% 0.062 255.3)
#6397DC 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) | #7B9BDF | 0.031 |
| Deuteranopia (no green cones) | #6C90DB | 0.020 |
| Tritanopia (no blue cones) | #0FA7B0 | 0.104 |
| Achromatopsia (no color) | #959595 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6397DC
#6397DC
oklch(66.9% 0.117 255.9)
- #BE8A36
#BE8A36
oklch(66.9% 0.117 75.9)
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 #6397DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.027
- Chefchaouen Blue #4895EF ΔE 0.038
- Dark Sky Blue #448EE4 ΔE 0.043
- Soft Blue #6488EA ΔE 0.049
- Faded Blue #658CBB ΔE 0.052
- Perrywinkle #8F8CE7 ΔE 0.063
- Periwinkle Blue #8F99FB ΔE 0.072
- Greyblue #77A1B5 ΔE 0.075
Use #6397DC 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.