#648FBA
Closest named color: Faded Blue (#658CBB). oklch(63.6% 0.08 249.2), rgb(100, 143, 186).
Aa
Black text reads best on this color (6.17:1).
About this color
#648FBA is a medium-light, moderately saturated blue. In OKLCH its lightness is 64%, its chroma 0.080 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.009 away. Black text reads best on it, at 6.17:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.17:1 |
| White text | 3.39:1 |
Values
| HEX | #648FBA |
| RGB | rgb(100, 143, 186) |
| HSL | hsl(210, 38%, 56%) |
| OKLCH | oklch(63.6% 0.08 249.2) |
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 #648FBA | 3.39:1 | AA large text | Lc -66.9 | Content text, not long reading |
| Black text on #648FBA | 6.17:1 | AA | Lc 42.7 | Non-text elements, placeholder text |
| #648FBA text on white | 3.39:1 | AA large text | Lc 61.4 | Content text, not long reading |
| #648FBA text on black | 6.17:1 | AA | Lc -40.3 | 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
#AEC3DA
oklch(80.9% 0.04 250.7)
-
Step 400
400
#82A4C7
oklch(70.6% 0.064 249.5)
-
Step 500
500 (this color)
#648FBA
oklch(63.6% 0.08 249.2)
-
Step 600
600
#4977A4
oklch(55.6% 0.087 249.1)
-
Step 700
700
#3A648D
oklch(49.1% 0.081 249.3)
-
Step 800
800
#305272
oklch(42.7% 0.067 248.2)
-
Step 900
900
#2B445C
oklch(37.7% 0.052 248.4)
-
Step 950
950
#192836
oklch(27% 0.033 247.4)
#648FBA 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) | #7E90BC | 0.033 |
| Deuteranopia (no green cones) | #7387B9 | 0.027 |
| Tritanopia (no blue cones) | #40999E | 0.068 |
| Achromatopsia (no color) | #8B8B8B | 0.080 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648FBA
#648FBA
oklch(63.6% 0.08 249.2)
- #AB8254
#AB8254
oklch(63.6% 0.08 68.8)
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 #648FBA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.009
- Silver Lake Blue #778DA9 ΔE 0.032
- Dusty Blue #5A86AD ΔE 0.032
- Blue Grey #758DA3 ΔE 0.038
- Off Blue #5684AE ΔE 0.038
- Cool Blue #4984B8 ΔE 0.045
- Light Slate Gray #778899 ΔE 0.051
- Steel Blue #4682B4 ΔE 0.052
Use #648FBA 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.