#638DAD
Closest named color: Faded Blue (#658CBB). oklch(62.5% 0.067 242), rgb(99, 141, 173).
Aa
Black text reads best on this color (5.94:1).
About this color
#638DAD is a medium-light, muted blue. In OKLCH its lightness is 63%, its chroma 0.067 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.023 away. Black text reads best on it, at 5.94:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.94:1 |
| White text | 3.53:1 |
Values
| HEX | #638DAD |
| RGB | rgb(99, 141, 173) |
| HSL | hsl(206, 31%, 53%) |
| OKLCH | oklch(62.5% 0.067 242) |
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 #638DAD | 3.53:1 | AA large text | Lc -68.3 | Content text, not long reading |
| Black text on #638DAD | 5.94:1 | AA | Lc 41.2 | Non-text elements, placeholder text |
| #638DAD text on white | 3.53:1 | AA large text | Lc 62.8 | Content text, not long reading |
| #638DAD text on black | 5.94:1 | AA | Lc -38.8 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AFC4D4
oklch(81% 0.032 240.7)
-
Step 400
400
#84A5BF
oklch(70.6% 0.053 242.2)
-
Step 500
500 (this color)
#638DAD
oklch(62.5% 0.067 242)
-
Step 600
600
#4B799A
oklch(55.7% 0.072 241)
-
Step 700
700
#3C6584
oklch(49% 0.068 242.5)
-
Step 800
800
#32536B
oklch(42.7% 0.056 241.3)
-
Step 900
900
#2C4557
oklch(37.8% 0.044 240.7)
-
Step 950
950
#1A2833
oklch(26.9% 0.028 242.7)
#638DAD 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) | #7F8DAF | 0.035 |
| Deuteranopia (no green cones) | #7685AC | 0.030 |
| Tritanopia (no blue cones) | #469598 | 0.054 |
| Achromatopsia (no color) | #888888 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #638DAD
#638DAD
oklch(62.5% 0.067 242)
- #A57F5D
#A57F5D
oklch(62.5% 0.067 62.9)
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 #638DAD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.023
- Dusty Blue #5A86AD ΔE 0.024
- Silver Lake Blue #778DA9 ΔE 0.025
- Blue Grey #758DA3 ΔE 0.025
- Off Blue #5684AE ΔE 0.032
- Light Slate Gray #778899 ΔE 0.035
- Steel #738595 ΔE 0.039
- Cool Blue #4984B8 ΔE 0.045
Use #638DAD 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.