#6399E2
Closest named color: Cornflower Blue (#6495ED). oklch(67.7% 0.123 256.3), rgb(99, 153, 226).
Aa
Black text reads best on this color (7.18:1).
About this color
#6399E2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.123 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.022 away. Black text reads best on it, at 7.18:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.18:1 |
| White text | 2.92:1 |
Values
| HEX | #6399E2 |
| RGB | rgb(99, 153, 226) |
| HSL | hsl(214, 69%, 64%) |
| OKLCH | oklch(67.7% 0.123 256.3) |
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 #6399E2 | 2.92:1 | Fails | Lc -60.8 | Content text, not long reading |
| Black text on #6399E2 | 7.18:1 | AAA | Lc 48.6 | Large or bold text, headings |
| #6399E2 text on white | 2.92:1 | Fails | Lc 55.5 | Large or bold text, headings |
| #6399E2 text on black | 7.18:1 | AAA | Lc -46.3 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#A1C3F2
oklch(80.9% 0.076 256.6)
-
Step 400
400 (this color)
#6399E2
oklch(67.7% 0.123 256.3)
-
Step 500
500
#4389E6
oklch(63% 0.157 256.5)
-
Step 600
600
#1F71D4
oklch(55.6% 0.17 256.1)
-
Step 700
700
#105EB8
oklch(49.1% 0.159 256.2)
-
Step 800
800
#124D95
oklch(42.7% 0.132 256.3)
-
Step 900
900
#174177
oklch(37.7% 0.103 256.3)
-
Step 950
950
#0F2645
oklch(26.9% 0.065 256.6)
#6399E2 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) | #7B9EE5 | 0.032 |
| Deuteranopia (no green cones) | #6B91E0 | 0.022 |
| Tritanopia (no blue cones) | #00A9B3 | 0.108 |
| Achromatopsia (no color) | #979797 | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6399E2
#6399E2
oklch(67.7% 0.123 256.3)
- #C28C31
#C28C31
oklch(67.7% 0.123 76.5)
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 #6399E2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.022
- Chefchaouen Blue #4895EF ΔE 0.034
- Dark Sky Blue #448EE4 ΔE 0.045
- Soft Blue #6488EA ΔE 0.049
- Faded Blue #658CBB ΔE 0.061
- Perrywinkle #8F8CE7 ΔE 0.062
- Periwinkle Blue #8F99FB ΔE 0.066
- Dodger Blue #1E90FF ΔE 0.072
Use #6399E2 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.