#648FAE
Closest named color: Silver Lake Blue (#778DA9). oklch(63.1% 0.066 240.5), rgb(100, 143, 174).
Aa
Black text reads best on this color (6.08:1).
About this color
#648FAE is a medium-light, muted blue. In OKLCH its lightness is 63%, its chroma 0.066 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Silver Lake Blue (#778DA9), ΔE 0.023 away. Black text reads best on it, at 6.08:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | muted (0.066) |
| Temperature | cool |
| Nearest name | Silver Lake Blue (#778DA9) |
| Black text | 6.08:1 |
| White text | 3.45:1 |
Values
| HEX | #648FAE |
| RGB | rgb(100, 143, 174) |
| HSL | hsl(205, 31%, 54%) |
| OKLCH | oklch(63.1% 0.066 240.5) |
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 #648FAE | 3.45:1 | AA large text | Lc -67.5 | Content text, not long reading |
| Black text on #648FAE | 6.08:1 | AA | Lc 42.1 | Non-text elements, placeholder text |
| #648FAE text on white | 3.45:1 | AA large text | Lc 62.0 | Content text, not long reading |
| #648FAE text on black | 6.08:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AFC4D4
oklch(81% 0.032 240.7)
-
Step 400
400
#84A5BE
oklch(70.6% 0.052 241.1)
-
Step 500
500 (this color)
#648FAE
oklch(63.1% 0.066 240.5)
-
Step 600
600
#4A799A
oklch(55.6% 0.073 240.4)
-
Step 700
700
#3B6683
oklch(49.2% 0.067 239.6)
-
Step 800
800
#31536B
oklch(42.7% 0.056 240.6)
-
Step 900
900
#2C4557
oklch(37.8% 0.044 240.7)
-
Step 950
950
#1A2833
oklch(26.9% 0.028 242.7)
#648FAE 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) | #828EB0 | 0.038 |
| Deuteranopia (no green cones) | #7887AD | 0.031 |
| Tritanopia (no blue cones) | #479799 | 0.054 |
| Achromatopsia (no color) | #8A8A8A | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #648FAE
#648FAE
oklch(63.1% 0.066 240.5)
- #A78060
#A78060
oklch(63% 0.066 60.6)
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 #648FAE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Silver Lake Blue #778DA9 ΔE 0.023
- Blue Grey #758DA3 ΔE 0.024
- Faded Blue #658CBB ΔE 0.024
- Dusty Blue #5A86AD ΔE 0.030
- Light Slate Gray #778899 ΔE 0.036
- Off Blue #5684AE ΔE 0.038
- Steel #738595 ΔE 0.041
- Cool Blue #4984B8 ΔE 0.050
Use #648FAE 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.