#648BC6
Closest named color: Faded Blue (#658CBB). oklch(63.3% 0.1 258.4), rgb(100, 139, 198).
Aa
Black text reads best on this color (6.05:1).
About this color
#648BC6 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.100 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.018 away. Black text reads best on it, at 6.05:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.05:1 |
| White text | 3.47:1 |
Values
| HEX | #648BC6 |
| RGB | rgb(100, 139, 198) |
| HSL | hsl(216, 46%, 58%) |
| OKLCH | oklch(63.3% 0.1 258.4) |
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 #648BC6 | 3.47:1 | AA large text | Lc -67.6 | Content text, not long reading |
| Black text on #648BC6 | 6.05:1 | AA | Lc 41.9 | Non-text elements, placeholder text |
| #648BC6 text on white | 3.47:1 | AA large text | Lc 62.2 | Content text, not long reading |
| #648BC6 text on black | 6.05:1 | AA | Lc -39.5 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF4
oklch(93.5% 0.015 260.7)
-
Step 200
200
#CEDAEB
oklch(88.4% 0.027 257)
-
Step 300
300
#AEC2E1
oklch(80.9% 0.049 259.1)
-
Step 400
400
#83A2D1
oklch(70.7% 0.077 258.5)
-
Step 500
500 (this color)
#648BC6
oklch(63.3% 0.1 258.4)
-
Step 600
600
#4A74B2
oklch(55.7% 0.108 258)
-
Step 700
700
#3B6199
oklch(49.1% 0.1 258)
-
Step 800
800
#314F7C
oklch(42.6% 0.083 258.3)
-
Step 900
900
#2C4264
oklch(37.7% 0.065 258.8)
-
Step 950
950
#1A273A
oklch(27% 0.04 257.8)
#648BC6 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) | #748FC9 | 0.024 |
| Deuteranopia (no green cones) | #6985C5 | 0.017 |
| Tritanopia (no blue cones) | #3898A0 | 0.088 |
| Achromatopsia (no color) | #8A8A8A | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648BC6
#648BC6
oklch(63.3% 0.1 258.4)
- #AB823D
#AB823D
oklch(63.3% 0.1 78.2)
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 #648BC6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.018
- Dusty Blue #5A86AD ΔE 0.041
- Cool Blue #4984B8 ΔE 0.042
- Off Blue #5684AE ΔE 0.043
- Steel Blue #4682B4 ΔE 0.050
- Silver Lake Blue #778DA9 ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.051
- Soft Blue #6488EA ΔE 0.057
Use #648BC6 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.