#6597FB
Closest named color: Cornflower Blue (#6495ED). oklch(68.7% 0.157 262.9), rgb(101, 151, 251).
Aa
Black text reads best on this color (7.37:1).
About this color
#6597FB is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.157 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.021 away. Black text reads best on it, at 7.37:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.37:1 |
| White text | 2.84:1 |
Values
| HEX | #6597FB |
| RGB | rgb(101, 151, 251) |
| HSL | hsl(220, 95%, 69%) |
| OKLCH | oklch(68.7% 0.157 262.9) |
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 #6597FB | 2.84:1 | Fails | Lc -59.6 | Large or bold text, headings |
| Black text on #6597FB | 7.37:1 | AAA | Lc 49.7 | Large or bold text, headings |
| #6597FB text on white | 2.84:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #6597FB text on black | 7.37:1 | AAA | Lc -47.5 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFE
oklch(93.6% 0.029 264.4)
-
Step 200
200
#C6DAFE
oklch(88.5% 0.054 262.2)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400 (this color)
#6597FB
oklch(68.7% 0.157 262.9)
-
Step 500
500
#4581FF
oklch(63.1% 0.198 262.9)
-
Step 600
600
#2666F0
oklch(55.6% 0.218 262.7)
-
Step 700
700
#1A53D1
oklch(49% 0.203 262.9)
-
Step 800
800
#1745A9
oklch(42.7% 0.168 262.8)
-
Step 900
900
#193C86
oklch(37.8% 0.131 262.8)
-
Step 950
950
#0F244E
oklch(27% 0.082 262.4)
#6597FB 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) | #6BA0FF | 0.025 |
| Deuteranopia (no green cones) | #5793F9 | 0.019 |
| Tritanopia (no blue cones) | #00ADBD | 0.135 |
| Achromatopsia (no color) | #999999 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6597FB
#6597FB
oklch(68.7% 0.157 262.9)
- #C59100
#C59100
oklch(68.8% 0.142 82.9)
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 #6597FB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.021
- Chefchaouen Blue #4895EF ΔE 0.034
- Soft Blue #6488EA ΔE 0.043
- Periwinkle Blue #8F99FB ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.053
- Lavender Blue #8B88F8 ΔE 0.055
- Dodger Blue #1E90FF ΔE 0.056
- Perrywinkle #8F8CE7 ΔE 0.058
Use #6597FB 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.