#6397CC
Closest named color: Faded Blue (#658CBB). oklch(66.2% 0.097 249.9), rgb(99, 151, 204).
Aa
Black text reads best on this color (6.82:1).
About this color
#6397CC is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.097 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.035 away. Black text reads best on it, at 6.82:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.82:1 |
| White text | 3.07:1 |
Values
| HEX | #6397CC |
| RGB | rgb(99, 151, 204) |
| HSL | hsl(210, 51%, 59%) |
| OKLCH | oklch(66.2% 0.097 249.9) |
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 #6397CC | 3.07:1 | AA large text | Lc -62.9 | Content text, not long reading |
| Black text on #6397CC | 6.82:1 | AA | Lc 46.5 | Large or bold text, headings |
| #6397CC text on white | 3.07:1 | AA large text | Lc 57.5 | Large or bold text, headings |
| #6397CC text on black | 6.82:1 | AA | Lc -44.2 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF3
oklch(93.6% 0.014 248)
-
Step 200
200
#CDDBEA
oklch(88.5% 0.026 250)
-
Step 300
300
#AAC4DF
oklch(81% 0.048 249.4)
-
Step 400
400
#7CA5CF
oklch(70.8% 0.076 249.5)
-
Step 500
500 (this color)
#6397CC
oklch(66.2% 0.097 249.9)
-
Step 600
600
#3E77AE
oklch(55.6% 0.105 249.5)
-
Step 700
700
#306496
oklch(49.2% 0.098 249.7)
-
Step 800
800
#29527A
oklch(42.8% 0.081 249.7)
-
Step 900
900
#264462
oklch(37.8% 0.063 249.8)
-
Step 950
950
#172839
oklch(27.1% 0.039 249.5)
#6397CC 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) | #8199CE | 0.036 |
| Deuteranopia (no green cones) | #748ECB | 0.029 |
| Tritanopia (no blue cones) | #2CA3A9 | 0.084 |
| Achromatopsia (no color) | #939393 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6397CC
#6397CC
oklch(66.2% 0.097 249.9)
- #B9884D
#B9884D
oklch(66.2% 0.097 69.9)
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 #6397CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.035
- Cornflower Blue #6495ED ΔE 0.052
- Silver Lake Blue #778DA9 ΔE 0.054
- Greyblue #77A1B5 ΔE 0.056
- Dark Sky Blue #448EE4 ΔE 0.057
- Chefchaouen Blue #4895EF ΔE 0.058
- Dusty Blue #5A86AD ΔE 0.061
- Blue Grey #758DA3 ΔE 0.061
Use #6397CC 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.