#6591E5
Closest named color: Cornflower Blue (#6495ED). oklch(66.2% 0.135 262.4), rgb(101, 145, 229).
Aa
Black text reads best on this color (6.73:1).
About this color
#6591E5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.135 and its hue 262°. 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 6.73:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.73:1 |
| White text | 3.11:1 |
Values
| HEX | #6591E5 |
| RGB | rgb(101, 145, 229) |
| HSL | hsl(219, 71%, 65%) |
| OKLCH | oklch(66.2% 0.135 262.4) |
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 #6591E5 | 3.11:1 | AA large text | Lc -63.4 | Content text, not long reading |
| Black text on #6591E5 | 6.73:1 | AA | Lc 46.0 | Large or bold text, headings |
| #6591E5 text on white | 3.11:1 | AA large text | Lc 58.0 | Large or bold text, headings |
| #6591E5 text on black | 6.73:1 | AA | Lc -43.7 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF7
oklch(93.6% 0.019 263)
-
Step 200
200
#CCDAF2
oklch(88.5% 0.036 261.3)
-
Step 300
300
#AAC1EC
oklch(80.8% 0.066 262.8)
-
Step 400
400
#7DA0E3
oklch(70.7% 0.106 262.8)
-
Step 500
500 (this color)
#6591E5
oklch(66.2% 0.135 262.4)
-
Step 600
600
#426FC8
oklch(55.5% 0.147 262.4)
-
Step 700
700
#345DAD
oklch(49.2% 0.136 262.2)
-
Step 800
800
#2C4C8C
oklch(42.7% 0.113 262.6)
-
Step 900
900
#274070
oklch(37.7% 0.088 262.2)
-
Step 950
950
#172641
oklch(27% 0.055 261.4)
#6591E5 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) | #6E98E8 | 0.022 |
| Deuteranopia (no green cones) | #5E8CE3 | 0.016 |
| Tritanopia (no blue cones) | #05A4B0 | 0.122 |
| Achromatopsia (no color) | #929292 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6591E5
#6591E5
oklch(66.2% 0.135 262.4)
- #BB8909
#BB8909
oklch(66.1% 0.134 82.2)
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 #6591E5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.014
- Soft Blue #6488EA ΔE 0.027
- Chefchaouen Blue #4895EF ΔE 0.029
- Dark Sky Blue #448EE4 ΔE 0.033
- Perrywinkle #8F8CE7 ΔE 0.053
- Lavender Blue #8B88F8 ΔE 0.061
- Dodger Blue #1E90FF ΔE 0.062
- Faded Blue #658CBB ΔE 0.062
Use #6591E5 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.