#6399CA
Closest named color: Faded Blue (#658CBB). oklch(66.5% 0.093 247.1), rgb(99, 153, 202).
Aa
Black text reads best on this color (6.93:1).
About this color
#6399CA is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.093 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.038 away. Black text reads best on it, at 6.93:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.93:1 |
| White text | 3.02:1 |
Values
| HEX | #6399CA |
| RGB | rgb(99, 153, 202) |
| HSL | hsl(209, 49%, 59%) |
| OKLCH | oklch(66.5% 0.093 247.1) |
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 #6399CA | 3.02:1 | AA large text | Lc -62.3 | Content text, not long reading |
| Black text on #6399CA | 6.93:1 | AA | Lc 47.2 | Large or bold text, headings |
| #6399CA text on white | 3.02:1 | AA large text | Lc 56.9 | Large or bold text, headings |
| #6399CA text on black | 6.93:1 | AA | Lc -44.9 | 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
#AAC4DD
oklch(80.9% 0.045 247.3)
-
Step 400
400
#7CA5CC
oklch(70.7% 0.073 247.6)
-
Step 500
500 (this color)
#6399CA
oklch(66.5% 0.093 247.1)
-
Step 600
600
#3D78AB
oklch(55.6% 0.101 246.9)
-
Step 700
700
#2F6593
oklch(49.2% 0.094 246.9)
-
Step 800
800
#285277
oklch(42.6% 0.078 247.4)
-
Step 900
900
#254460
oklch(37.6% 0.061 247.4)
-
Step 950
950
#162838
oklch(26.9% 0.038 246.6)
#6399CA 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) | #859ACC | 0.040 |
| Deuteranopia (no green cones) | #7790C9 | 0.031 |
| Tritanopia (no blue cones) | #2DA5AA | 0.079 |
| Achromatopsia (no color) | #949494 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6399CA
#6399CA
oklch(66.5% 0.093 247.1)
- #BA8853
#BA8853
oklch(66.4% 0.093 66.7)
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 #6399CA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.038
- Greyblue #77A1B5 ΔE 0.049
- Silver Lake Blue #778DA9 ΔE 0.053
- Cornflower Blue #6495ED ΔE 0.057
- Blue Grey #758DA3 ΔE 0.060
- Dark Sky Blue #448EE4 ΔE 0.063
- Cool Gray #8D99AE ΔE 0.063
- Chefchaouen Blue #4895EF ΔE 0.063
Use #6399CA 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.