#657DC9
Closest named color: Cool Blue (#4984B8). oklch(60.5% 0.119 269.4), rgb(101, 125, 201).
Aa
Black text reads best on this color (5.33:1).
About this color
#657DC9 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.119 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.047 away. Black text reads best on it, at 5.33:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.33:1 |
| White text | 3.93:1 |
Values
| HEX | #657DC9 |
| RGB | rgb(101, 125, 201) |
| HSL | hsl(226, 48%, 59%) |
| OKLCH | oklch(60.5% 0.119 269.4) |
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 #657DC9 | 3.93:1 | AA large text | Lc -72.2 | Content text, not long reading |
| Black text on #657DC9 | 5.33:1 | AA | Lc 37.4 | Non-text elements, placeholder text |
| #657DC9 text on white | 3.93:1 | AA large text | Lc 66.7 | Content text, not long reading |
| #657DC9 text on black | 5.33:1 | AA | Lc -35.0 | 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
#D0D9EF
oklch(88.5% 0.032 268)
-
Step 300
300
#B1C0E7
oklch(80.9% 0.058 268.6)
-
Step 400
400
#899EDB
oklch(70.7% 0.093 269.3)
-
Step 500
500 (this color)
#657DC9
oklch(60.5% 0.119 269.4)
-
Step 600
600
#556DBF
oklch(55.5% 0.13 269.5)
-
Step 700
700
#455BA5
oklch(49.1% 0.121 269.1)
-
Step 800
800
#394B85
oklch(42.8% 0.099 269)
-
Step 900
900
#313F6B
oklch(37.8% 0.078 269.1)
-
Step 950
950
#1D253F
oklch(27.1% 0.05 269.9)
#657DC9 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) | #6085CC | 0.021 |
| Deuteranopia (no green cones) | #557CC7 | 0.020 |
| Tritanopia (no blue cones) | #3B8D99 | 0.107 |
| Achromatopsia (no color) | #808080 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #657DC9
#657DC9
oklch(60.5% 0.119 269.4)
- #9E7D11
#9E7D11
oklch(60.5% 0.119 89.3)
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 #657DC9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.047
- Faded Blue #658CBB ΔE 0.052
- Steel Blue #4682B4 ΔE 0.052
- Soft Blue #6488EA ΔE 0.053
- Off Blue #5684AE ΔE 0.054
- Windows Blue #3778BF ΔE 0.054
- Dusty Blue #5A86AD ΔE 0.057
- Dark Sky Blue #448EE4 ΔE 0.059
Use #657DC9 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.