#657AC7
Closest named color: Cool Blue (#4984B8). oklch(59.7% 0.12 270.9), rgb(101, 122, 199).
Aa
Black text reads best on this color (5.16:1).
About this color
#657AC7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.120 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.049 away. Black text reads best on it, at 5.16:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.120) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.16:1 |
| White text | 4.06:1 |
Values
| HEX | #657AC7 |
| RGB | rgb(101, 122, 199) |
| HSL | hsl(227, 47%, 59%) |
| OKLCH | oklch(59.7% 0.12 270.9) |
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 #657AC7 | 4.06:1 | AA large text | Lc -73.3 | Content text, not long reading |
| Black text on #657AC7 | 5.16:1 | AA | Lc 36.3 | Non-text elements, placeholder text |
| #657AC7 text on white | 4.06:1 | AA large text | Lc 67.8 | Content text, not long reading |
| #657AC7 text on black | 5.16:1 | AA | Lc -33.9 | 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
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D1D9EF
oklch(88.6% 0.031 269.8)
-
Step 300
300
#B2BFE8
oklch(80.8% 0.06 271.2)
-
Step 400
400
#8B9EDC
oklch(70.8% 0.094 270.8)
-
Step 500
500 (this color)
#657AC7
oklch(59.7% 0.12 270.9)
-
Step 600
600
#576CBF
oklch(55.5% 0.131 270.9)
-
Step 700
700
#485AA5
oklch(49.1% 0.122 271.2)
-
Step 800
800
#3B4A86
oklch(42.7% 0.101 271)
-
Step 900
900
#323E6B
oklch(37.6% 0.079 270.9)
-
Step 950
950
#1D253F
oklch(27.1% 0.05 269.9)
#657AC7 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) | #5C82CA | 0.022 |
| Deuteranopia (no green cones) | #527AC5 | 0.023 |
| Tritanopia (no blue cones) | #3D8A97 | 0.107 |
| Achromatopsia (no color) | #7E7E7E | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #657AC7
#657AC7
oklch(59.7% 0.12 270.9)
- #9A7C08
#9A7C08
oklch(59.8% 0.12 91.4)
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 #657AC7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.049
- Windows Blue #3778BF ΔE 0.052
- Steel Blue #4682B4 ΔE 0.053
- Off Blue #5684AE ΔE 0.056
- Faded Blue #658CBB ΔE 0.058
- Soft Blue #6488EA ΔE 0.059
- Dusty Blue #5A86AD ΔE 0.060
- Dark Sky Blue #448EE4 ΔE 0.065
Use #657AC7 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.