#648BC1
Closest named color: Faded Blue (#658CBB). oklch(63% 0.093 256.7), rgb(100, 139, 193).
Aa
Black text reads best on this color (6.00:1).
About this color
#648BC1 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.093 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.010 away. Black text reads best on it, at 6.00:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.00:1 |
| White text | 3.49:1 |
Values
| HEX | #648BC1 |
| RGB | rgb(100, 139, 193) |
| HSL | hsl(215, 43%, 57%) |
| OKLCH | oklch(63% 0.093 256.7) |
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 #648BC1 | 3.49:1 | AA large text | Lc -67.9 | Content text, not long reading |
| Black text on #648BC1 | 6.00:1 | AA | Lc 41.6 | Non-text elements, placeholder text |
| #648BC1 text on white | 3.49:1 | AA large text | Lc 62.4 | Content text, not long reading |
| #648BC1 text on black | 6.00:1 | AA | Lc -39.2 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CFDAEA
oklch(88.5% 0.025 257.6)
-
Step 300
300
#AEC2DE
oklch(80.8% 0.045 256.8)
-
Step 400
400
#83A3CE
oklch(70.7% 0.073 255.9)
-
Step 500
500 (this color)
#648BC1
oklch(63% 0.093 256.7)
-
Step 600
600
#4B74AE
oklch(55.5% 0.102 257.2)
-
Step 700
700
#3C6295
oklch(49.2% 0.093 256.2)
-
Step 800
800
#325079
oklch(42.8% 0.077 256.5)
-
Step 900
900
#2C4261
oklch(37.6% 0.06 257)
-
Step 950
950
#1A2739
oklch(27% 0.038 256.7)
#648BC1 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) | #768EC3 | 0.025 |
| Deuteranopia (no green cones) | #6B85C0 | 0.017 |
| Tritanopia (no blue cones) | #3C979E | 0.082 |
| Achromatopsia (no color) | #898989 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648BC1
#648BC1
oklch(63% 0.093 256.7)
- #A98144
#A98144
oklch(62.9% 0.093 76.2)
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 #648BC1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.010
- Dusty Blue #5A86AD ΔE 0.034
- Off Blue #5684AE ΔE 0.037
- Cool Blue #4984B8 ΔE 0.039
- Silver Lake Blue #778DA9 ΔE 0.044
- Steel Blue #4682B4 ΔE 0.046
- Blue Grey #758DA3 ΔE 0.051
- Dark Sky Blue #448EE4 ΔE 0.057
Use #648BC1 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.