#648EB7
Closest named color: Faded Blue (#658CBB). oklch(63.2% 0.077 248.5), rgb(100, 142, 183).
Aa
Black text reads best on this color (6.09:1).
About this color
#648EB7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 63%, its chroma 0.077 and its hue 249°. 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 6.09:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | moderately saturated (0.077) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.09:1 |
| White text | 3.44:1 |
Values
| HEX | #648EB7 |
| RGB | rgb(100, 142, 183) |
| HSL | hsl(210, 37%, 55%) |
| OKLCH | oklch(63.2% 0.077 248.5) |
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 #648EB7 | 3.44:1 | AA large text | Lc -67.4 | Content text, not long reading |
| Black text on #648EB7 | 6.09:1 | AA | Lc 42.2 | Non-text elements, placeholder text |
| #648EB7 text on white | 3.44:1 | AA large text | Lc 61.9 | Content text, not long reading |
| #648EB7 text on black | 6.09:1 | AA | Lc -39.8 | 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
#CFDBE7
oklch(88.6% 0.021 248.1)
-
Step 300
300
#AEC3D9
oklch(80.8% 0.039 249.5)
-
Step 400
400
#83A4C5
oklch(70.6% 0.061 248.7)
-
Step 500
500 (this color)
#648EB7
oklch(63.2% 0.077 248.5)
-
Step 600
600
#4A77A3
oklch(55.6% 0.085 249.1)
-
Step 700
700
#3B648B
oklch(49.1% 0.078 248.5)
-
Step 800
800
#315271
oklch(42.7% 0.065 248.1)
-
Step 900
900
#2C445B
oklch(37.8% 0.05 248.2)
-
Step 950
950
#1A2835
oklch(27% 0.031 247.2)
#648EB7 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) | #7E8FB9 | 0.033 |
| Deuteranopia (no green cones) | #7386B6 | 0.027 |
| Tritanopia (no blue cones) | #42979C | 0.065 |
| Achromatopsia (no color) | #8A8A8A | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648EB7
#648EB7
oklch(63.2% 0.077 248.5)
- #A98155
#A98155
oklch(63.2% 0.078 68.3)
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 #648EB7, 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 0.029
- Silver Lake Blue #778DA9 ΔE 0.029
- Blue Grey #758DA3 ΔE 0.034
- Off Blue #5684AE ΔE 0.035
- Cool Blue #4984B8 ΔE 0.043
- Light Slate Gray #778899 ΔE 0.047
- Steel Blue #4682B4 ΔE 0.050
Use #648EB7 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.