#6590ED
Closest named color: Cornflower Blue (#6495ED). oklch(66.5% 0.147 264.1), rgb(101, 144, 237).
Aa
Black text reads best on this color (6.76:1).
About this color
#6590ED is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.147 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.013 away. Black text reads best on it, at 6.76:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.76:1 |
| White text | 3.10:1 |
Values
| HEX | #6590ED |
| RGB | rgb(101, 144, 237) |
| HSL | hsl(221, 79%, 66%) |
| OKLCH | oklch(66.5% 0.147 264.1) |
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 #6590ED | 3.10:1 | AA large text | Lc -63.2 | Content text, not long reading |
| Black text on #6590ED | 6.76:1 | AA | Lc 46.2 | Large or bold text, headings |
| #6590ED text on white | 3.10:1 | AA large text | Lc 57.8 | Large or bold text, headings |
| #6590ED text on black | 6.76:1 | AA | Lc -43.9 | 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
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCDAF4
oklch(88.6% 0.039 262.9)
-
Step 300
300
#A9C1F0
oklch(80.9% 0.072 263.7)
-
Step 400
400
#7C9FE8
oklch(70.6% 0.114 264.1)
-
Step 500
500 (this color)
#6590ED
oklch(66.5% 0.147 264.1)
-
Step 600
600
#426DCF
oklch(55.6% 0.159 264.1)
-
Step 700
700
#345BB4
oklch(49.2% 0.148 264)
-
Step 800
800
#2B4A91
oklch(42.6% 0.123 264.1)
-
Step 900
900
#273F74
oklch(37.7% 0.096 264)
-
Step 950
950
#172544
oklch(27% 0.061 264.4)
#6590ED 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) | #6999F1 | 0.025 |
| Deuteranopia (no green cones) | #578CEB | 0.019 |
| Tritanopia (no blue cones) | #00A5B3 | 0.130 |
| Achromatopsia (no color) | #929292 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6590ED
#6590ED
oklch(66.5% 0.147 264.1)
- #BB8B00
#BB8B00
oklch(66.5% 0.137 84)
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 #6590ED, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.013
- Soft Blue #6488EA ΔE 0.021
- Chefchaouen Blue #4895EF ΔE 0.027
- Dark Sky Blue #448EE4 ΔE 0.036
- Perrywinkle #8F8CE7 ΔE 0.052
- Lavender Blue #8B88F8 ΔE 0.054
- Dodger Blue #1E90FF ΔE 0.055
- Cornflower #6A79F7 ΔE 0.062
Use #6590ED 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.