#6597E5
Closest named color: Cornflower Blue (#6495ED). oklch(67.5% 0.128 259), rgb(101, 151, 229).
Aa
Black text reads best on this color (7.11:1).
About this color
#6597E5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.128 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.014 away. Black text reads best on it, at 7.11:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.11:1 |
| White text | 2.95:1 |
Values
| HEX | #6597E5 |
| RGB | rgb(101, 151, 229) |
| HSL | hsl(217, 71%, 65%) |
| OKLCH | oklch(67.5% 0.128 259) |
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 #6597E5 | 2.95:1 | Fails | Lc -61.2 | Content text, not long reading |
| Black text on #6597E5 | 7.11:1 | AAA | Lc 48.2 | Large or bold text, headings |
| #6597E5 text on white | 2.95:1 | Fails | Lc 55.9 | Large or bold text, headings |
| #6597E5 text on black | 7.11:1 | AAA | Lc -45.9 | 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
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DAF7
oklch(88.4% 0.045 259.9)
-
Step 300
300
#A2C2F5
oklch(80.9% 0.081 259.6)
-
Step 400
400 (this color)
#6597E5
oklch(67.5% 0.128 259)
-
Step 500
500
#4787EB
oklch(63.1% 0.165 259.1)
-
Step 600
600
#286ED9
oklch(55.5% 0.178 259.1)
-
Step 700
700
#1A5CBC
oklch(49.2% 0.165 258.8)
-
Step 800
800
#184B98
oklch(42.6% 0.137 259)
-
Step 900
900
#1B4079
oklch(37.8% 0.106 258.9)
-
Step 950
950
#102647
oklch(27% 0.068 258.4)
#6597E5 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) | #779DE8 | 0.028 |
| Deuteranopia (no green cones) | #6791E3 | 0.016 |
| Tritanopia (no blue cones) | #00A8B3 | 0.114 |
| Achromatopsia (no color) | #969696 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6597E5
#6597E5
oklch(67.5% 0.128 259)
- #C18C26
#C18C26
oklch(67.5% 0.128 78.8)
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 #6597E5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.014
- Chefchaouen Blue #4895EF ΔE 0.031
- Dark Sky Blue #448EE4 ΔE 0.042
- Soft Blue #6488EA ΔE 0.042
- Perrywinkle #8F8CE7 ΔE 0.056
- Periwinkle Blue #8F99FB ΔE 0.062
- Faded Blue #658CBB ΔE 0.064
- Lavender Blue #8B88F8 ΔE 0.068
Use #6597E5 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.