#6380CB
Closest named color: Cool Blue (#4984B8). oklch(61.1% 0.119 266.9), rgb(99, 128, 203).
Aa
Black text reads best on this color (5.48:1).
About this color
#6380CB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.119 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.045 away. Black text reads best on it, at 5.48:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.48:1 |
| White text | 3.83:1 |
Values
| HEX | #6380CB |
| RGB | rgb(99, 128, 203) |
| HSL | hsl(223, 50%, 59%) |
| OKLCH | oklch(61.1% 0.119 266.9) |
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 #6380CB | 3.83:1 | AA large text | Lc -71.2 | Content text, not long reading |
| Black text on #6380CB | 5.48:1 | AA | Lc 38.4 | Non-text elements, placeholder text |
| #6380CB text on white | 3.83:1 | AA large text | Lc 65.7 | Content text, not long reading |
| #6380CB text on black | 5.48:1 | AA | Lc -36.0 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#CFD9EF
oklch(88.4% 0.032 266.1)
-
Step 300
300
#B0C0E7
oklch(80.9% 0.058 267.6)
-
Step 400
400
#869FDB
oklch(70.7% 0.093 266.7)
-
Step 500
500 (this color)
#6380CB
oklch(61.1% 0.119 266.9)
-
Step 600
600
#516FBF
oklch(55.7% 0.129 266.7)
-
Step 700
700
#425CA5
oklch(49.1% 0.121 267.1)
-
Step 800
800
#364B85
oklch(42.6% 0.1 267.1)
-
Step 900
900
#2F3F6B
oklch(37.6% 0.078 267.5)
-
Step 950
950
#1B253F
oklch(26.9% 0.051 267)
#6380CB 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) | #6387CE | 0.019 |
| Deuteranopia (no green cones) | #577EC9 | 0.016 |
| Tritanopia (no blue cones) | #33909C | 0.106 |
| Achromatopsia (no color) | #828282 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6380CB
#6380CB
oklch(61.1% 0.119 266.9)
- #A27E15
#A27E15
oklch(61.1% 0.119 87.3)
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 #6380CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.045
- Faded Blue #658CBB ΔE 0.047
- Soft Blue #6488EA ΔE 0.048
- Steel Blue #4682B4 ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.052
- Off Blue #5684AE ΔE 0.052
- Dusty Blue #5A86AD ΔE 0.055
- Windows Blue #3778BF ΔE 0.056
Use #6380CB 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.