#648ED5
Closest named color: Dark Sky Blue (#448EE4). oklch(64.7% 0.117 260.4), rgb(100, 142, 213).
Aa
Black text reads best on this color (6.37:1).
About this color
#648ED5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.117 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.036 away. Black text reads best on it, at 6.37:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.37:1 |
| White text | 3.29:1 |
Values
| HEX | #648ED5 |
| RGB | rgb(100, 142, 213) |
| HSL | hsl(218, 57%, 61%) |
| OKLCH | oklch(64.7% 0.117 260.4) |
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 #648ED5 | 3.29:1 | AA large text | Lc -65.6 | Content text, not long reading |
| Black text on #648ED5 | 6.37:1 | AA | Lc 43.9 | Non-text elements, placeholder text |
| #648ED5 text on white | 3.29:1 | AA large text | Lc 60.2 | Content text, not long reading |
| #648ED5 text on black | 6.37:1 | AA | Lc -41.5 | 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
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E4EAF5
oklch(93.6% 0.016 262.8)
-
Step 200
200
#CDDAEF
oklch(88.5% 0.032 260)
-
Step 300
300
#ACC2E6
oklch(81% 0.056 260.2)
-
Step 400
400
#80A1DA
oklch(70.6% 0.092 261.1)
-
Step 500
500 (this color)
#648ED5
oklch(64.7% 0.117 260.4)
-
Step 600
600
#4672BD
oklch(55.7% 0.127 260.4)
-
Step 700
700
#375FA3
oklch(49.1% 0.118 260.3)
-
Step 800
800
#2E4E84
oklch(42.7% 0.098 260.3)
-
Step 900
900
#29416A
oklch(37.7% 0.077 260.5)
-
Step 950
950
#18263E
oklch(26.9% 0.049 260.7)
#648ED5 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) | #7293D8 | 0.023 |
| Deuteranopia (no green cones) | #6489D3 | 0.013 |
| Tritanopia (no blue cones) | #279EA8 | 0.105 |
| Achromatopsia (no color) | #8E8E8E | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648ED5
#648ED5
oklch(64.7% 0.117 260.4)
- #B3862C
#B3862C
oklch(64.8% 0.117 80.8)
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 #648ED5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.036
- Cornflower Blue #6495ED ΔE 0.037
- Soft Blue #6488EA ΔE 0.039
- Faded Blue #658CBB ΔE 0.039
- Chefchaouen Blue #4895EF ΔE 0.044
- Cool Blue #4984B8 ΔE 0.059
- Perrywinkle #8F8CE7 ΔE 0.063
- Dusty Blue #5A86AD ΔE 0.063
Use #648ED5 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.