#6399C8
Closest named color: Faded Blue (#658CBB). oklch(66.4% 0.091 246), rgb(99, 153, 200).
Aa
Black text reads best on this color (6.92:1).
About this color
#6399C8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.091 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.037 away. Black text reads best on it, at 6.92:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.92:1 |
| White text | 3.03:1 |
Values
| HEX | #6399C8 |
| RGB | rgb(99, 153, 200) |
| HSL | hsl(208, 48%, 59%) |
| OKLCH | oklch(66.4% 0.091 246) |
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 #6399C8 | 3.03:1 | AA large text | Lc -62.4 | Content text, not long reading |
| Black text on #6399C8 | 6.92:1 | AA | Lc 47.0 | Large or bold text, headings |
| #6399C8 text on white | 3.03:1 | AA large text | Lc 57.0 | Large or bold text, headings |
| #6399C8 text on black | 6.92:1 | AA | Lc -44.8 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E3EBF2
oklch(93.6% 0.013 244.3)
-
Step 200
200
#CCDBE9
oklch(88.4% 0.025 246.2)
-
Step 300
300
#AAC4DC
oklch(80.9% 0.044 246.2)
-
Step 400
400
#7CA5CB
oklch(70.6% 0.072 246.9)
-
Step 500
500 (this color)
#6399C8
oklch(66.4% 0.091 246)
-
Step 600
600
#3D78A9
oklch(55.5% 0.098 245.9)
-
Step 700
700
#2F6591
oklch(49.1% 0.091 245.8)
-
Step 800
800
#285376
oklch(42.8% 0.076 245.4)
-
Step 900
900
#25445F
oklch(37.6% 0.059 246.5)
-
Step 950
950
#162838
oklch(26.9% 0.038 246.6)
#6399C8 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) | #859ACA | 0.041 |
| Deuteranopia (no green cones) | #788FC7 | 0.034 |
| Tritanopia (no blue cones) | #2FA4A9 | 0.076 |
| Achromatopsia (no color) | #949494 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6399C8
#6399C8
oklch(66.4% 0.091 246)
- #BA8855
#BA8855
oklch(66.5% 0.091 65.7)
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 #6399C8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.037
- Greyblue #77A1B5 ΔE 0.047
- Silver Lake Blue #778DA9 ΔE 0.051
- Blue Grey #758DA3 ΔE 0.057
- Cornflower Blue #6495ED ΔE 0.060
- Cool Gray #8D99AE ΔE 0.061
- Dusty Blue #5A86AD ΔE 0.062
- Bluey Grey #89A0B0 ΔE 0.063
Use #6399C8 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.