#657ACA
Closest named color: Cool Blue (#4984B8). oklch(59.9% 0.124 271.1), rgb(101, 122, 202).
Aa
Black text reads best on this color (5.19:1).
About this color
#657ACA is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.124 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.052 away. Black text reads best on it, at 5.19:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.19:1 |
| White text | 4.04:1 |
Values
| HEX | #657ACA |
| RGB | rgb(101, 122, 202) |
| HSL | hsl(228, 49%, 59%) |
| OKLCH | oklch(59.9% 0.124 271.1) |
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 #657ACA | 4.04:1 | AA large text | Lc -73.1 | Content text, not long reading |
| Black text on #657ACA | 5.19:1 | AA | Lc 36.5 | Non-text elements, placeholder text |
| #657ACA text on white | 4.04:1 | AA large text | Lc 67.6 | Content text, not long reading |
| #657ACA text on black | 5.19:1 | AA | Lc -34.1 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5E9F6
oklch(93.5% 0.018 272.3)
-
Step 200
200
#D1D8F0
oklch(88.4% 0.034 272.8)
-
Step 300
300
#B2BFE9
oklch(80.9% 0.061 271.5)
-
Step 400
400
#8A9DDE
oklch(70.7% 0.098 271.2)
-
Step 500
500 (this color)
#657ACA
oklch(59.9% 0.124 271.1)
-
Step 600
600
#576CC2
oklch(55.6% 0.135 271.1)
-
Step 700
700
#475AA7
oklch(49.1% 0.125 270.8)
-
Step 800
800
#3A4A88
oklch(42.8% 0.104 270.6)
-
Step 900
900
#323E6C
oklch(37.7% 0.08 271.1)
-
Step 950
950
#1D2540
oklch(27.1% 0.052 270.2)
#657ACA 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) | #5B83CD | 0.025 |
| Deuteranopia (no green cones) | #507AC8 | 0.025 |
| Tritanopia (no blue cones) | #3A8B98 | 0.112 |
| Achromatopsia (no color) | #7E7E7E | 0.125 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #657ACA
#657ACA
oklch(59.9% 0.124 271.1)
- #9B7C00
#9B7C00
oklch(59.9% 0.122 91.2)
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 #657ACA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.052
- Windows Blue #3778BF ΔE 0.053
- Soft Blue #6488EA ΔE 0.055
- Steel Blue #4682B4 ΔE 0.056
- Off Blue #5684AE ΔE 0.060
- Faded Blue #658CBB ΔE 0.060
- Dark Sky Blue #448EE4 ΔE 0.063
- Dusty Blue #5A86AD ΔE 0.064
Use #657ACA 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.