#648EB5
Closest named color: Faded Blue (#658CBB). oklch(63.1% 0.075 247.3), rgb(100, 142, 181).
Aa
Black text reads best on this color (6.07:1).
About this color
#648EB5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.075 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.012 away. Black text reads best on it, at 6.07:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.075) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.07:1 |
| White text | 3.45:1 |
Values
| HEX | #648EB5 |
| RGB | rgb(100, 142, 181) |
| HSL | hsl(209, 35%, 55%) |
| OKLCH | oklch(63.1% 0.075 247.3) |
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 #648EB5 | 3.45:1 | AA large text | Lc -67.5 | Content text, not long reading |
| Black text on #648EB5 | 6.07:1 | AA | Lc 42.1 | Non-text elements, placeholder text |
| #648EB5 text on white | 3.45:1 | AA large text | Lc 62.0 | Content text, not long reading |
| #648EB5 text on black | 6.07:1 | AA | Lc -39.7 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CFDBE6
oklch(88.6% 0.02 245.7)
-
Step 300
300
#AEC3D8
oklch(80.8% 0.038 248.3)
-
Step 400
400
#83A5C4
oklch(70.8% 0.059 246.3)
-
Step 500
500 (this color)
#648EB5
oklch(63.1% 0.075 247.3)
-
Step 600
600
#4A78A1
oklch(55.7% 0.082 246.8)
-
Step 700
700
#3B648A
oklch(49% 0.077 247.9)
-
Step 800
800
#315270
oklch(42.7% 0.063 247.3)
-
Step 900
900
#2C445A
oklch(37.7% 0.048 247.1)
-
Step 950
950
#1A2835
oklch(27% 0.031 247.2)
#648EB5 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) | #7E8FB7 | 0.033 |
| Deuteranopia (no green cones) | #7486B4 | 0.028 |
| Tritanopia (no blue cones) | #43979B | 0.063 |
| Achromatopsia (no color) | #8A8A8A | 0.075 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648EB5
#648EB5
oklch(63.1% 0.075 247.3)
- #A88157
#A88157
oklch(63.1% 0.075 67.8)
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 #648EB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.012
- Silver Lake Blue #778DA9 ΔE 0.027
- Dusty Blue #5A86AD ΔE 0.028
- Blue Grey #758DA3 ΔE 0.032
- Off Blue #5684AE ΔE 0.035
- Cool Blue #4984B8 ΔE 0.044
- Light Slate Gray #778899 ΔE 0.044
- Steel #738595 ΔE 0.049
Use #648EB5 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.