#648FE9
Closest named color: Cornflower Blue (#6495ED). oklch(66% 0.143 263.7), rgb(100, 143, 233).
Aa
Black text reads best on this color (6.64:1).
About this color
#648FE9 is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.143 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.016 away. Black text reads best on it, at 6.64:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 6.64:1 |
| White text | 3.15:1 |
Values
| HEX | #648FE9 |
| RGB | rgb(100, 143, 233) |
| HSL | hsl(221, 75%, 65%) |
| OKLCH | oklch(66% 0.143 263.7) |
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 #648FE9 | 3.15:1 | AA large text | Lc -63.9 | Content text, not long reading |
| Black text on #648FE9 | 6.64:1 | AA | Lc 45.5 | Large or bold text, headings |
| #648FE9 text on white | 3.15:1 | AA large text | Lc 58.5 | Large or bold text, headings |
| #648FE9 text on black | 6.64:1 | AA | Lc -43.2 | 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
#AAC1EF
oklch(81% 0.07 264.1)
-
Step 400
400
#7CA0E6
oklch(70.8% 0.111 263)
-
Step 500
500 (this color)
#648FE9
oklch(66% 0.143 263.7)
-
Step 600
600
#426ECD
oklch(55.6% 0.155 263.5)
-
Step 700
700
#345BB1
oklch(49% 0.144 263.6)
-
Step 800
800
#2C4B90
oklch(42.8% 0.12 263.9)
-
Step 900
900
#273F73
oklch(37.7% 0.094 263.8)
-
Step 950
950
#172543
oklch(26.9% 0.059 264)
#648FE9 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) | #6997ED | 0.023 |
| Deuteranopia (no green cones) | #588BE7 | 0.018 |
| Tritanopia (no blue cones) | #00A3B1 | 0.127 |
| Achromatopsia (no color) | #919191 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648FE9
#648FE9
oklch(66% 0.143 263.7)
- #B98900
#B98900
oklch(65.9% 0.135 83.6)
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 #648FE9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.016
- Soft Blue #6488EA ΔE 0.019
- Chefchaouen Blue #4895EF ΔE 0.028
- Dark Sky Blue #448EE4 ΔE 0.032
- Perrywinkle #8F8CE7 ΔE 0.053
- Dodger Blue #1E90FF ΔE 0.057
- Lavender Blue #8B88F8 ΔE 0.057
- Cornflower #6A79F7 ΔE 0.062
Use #648FE9 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.