#6597E9
Closest named color: Cornflower Blue (#6495ED). oklch(67.7% 0.134 259.9), rgb(101, 151, 233).
Aa
Black text reads best on this color (7.15:1).
About this color
#6597E9 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.134 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.009 away. Black text reads best on it, at 7.15:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.134) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.15:1 |
| White text | 2.93:1 |
Values
| HEX | #6597E9 |
| RGB | rgb(101, 151, 233) |
| HSL | hsl(217, 75%, 65%) |
| OKLCH | oklch(67.7% 0.134 259.9) |
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 #6597E9 | 2.93:1 | Fails | Lc -60.9 | Content text, not long reading |
| Black text on #6597E9 | 7.15:1 | AAA | Lc 48.4 | Large or bold text, headings |
| #6597E9 text on white | 2.93:1 | Fails | Lc 55.6 | Large or bold text, headings |
| #6597E9 text on black | 7.15:1 | AAA | Lc -46.2 | 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
#E1EBFB
oklch(93.7% 0.024 259.8)
-
Step 200
200
#C8DAF8
oklch(88.4% 0.046 260.7)
-
Step 300
300
#A1C2F7
oklch(80.9% 0.084 259.8)
-
Step 400
400 (this color)
#6597E9
oklch(67.7% 0.134 259.9)
-
Step 500
500
#4786EF
oklch(63.1% 0.171 260)
-
Step 600
600
#276DDD
oklch(55.6% 0.185 259.7)
-
Step 700
700
#1A5AC0
oklch(49% 0.173 259.9)
-
Step 800
800
#184A9B
oklch(42.6% 0.143 259.9)
-
Step 900
900
#1A3F7B
oklch(37.6% 0.111 259.7)
-
Step 950
950
#102548
oklch(26.9% 0.071 260)
#6597E9 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) | #759DEC | 0.026 |
| Deuteranopia (no green cones) | #6491E7 | 0.016 |
| Tritanopia (no blue cones) | #00A9B5 | 0.118 |
| Achromatopsia (no color) | #979797 | 0.134 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6597E9
#6597E9
oklch(67.7% 0.134 259.9)
- #C28D1B
#C28D1B
oklch(67.8% 0.133 80.2)
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 #6597E9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.009
- Chefchaouen Blue #4895EF ΔE 0.029
- Soft Blue #6488EA ΔE 0.040
- Dark Sky Blue #448EE4 ΔE 0.042
- Perrywinkle #8F8CE7 ΔE 0.055
- Periwinkle Blue #8F99FB ΔE 0.059
- Lavender Blue #8B88F8 ΔE 0.064
- Dodger Blue #1E90FF ΔE 0.065
Use #6597E9 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.