#657FBB
Closest named color: Off Blue (#5684AE). oklch(60.2% 0.097 265.7), rgb(101, 127, 187).
Aa
Black text reads best on this color (5.30:1).
About this color
#657FBB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.097 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.033 away. Black text reads best on it, at 5.30:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.30:1 |
| White text | 3.95:1 |
Values
| HEX | #657FBB |
| RGB | rgb(101, 127, 187) |
| HSL | hsl(222, 39%, 56%) |
| OKLCH | oklch(60.2% 0.097 265.7) |
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 #657FBB | 3.95:1 | AA large text | Lc -72.4 | Content text, not long reading |
| Black text on #657FBB | 5.30:1 | AA | Lc 37.2 | Non-text elements, placeholder text |
| #657FBB text on white | 3.95:1 | AA large text | Lc 66.9 | Content text, not long reading |
| #657FBB text on black | 5.30:1 | AA | Lc -34.8 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF3
oklch(93.6% 0.013 262.4)
-
Step 200
200
#D1D9EB
oklch(88.5% 0.026 266.6)
-
Step 300
300
#B2C1E0
oklch(81% 0.047 264.9)
-
Step 400
400
#8AA0D1
oklch(70.7% 0.076 265.7)
-
Step 500
500 (this color)
#657FBB
oklch(60.2% 0.097 265.7)
-
Step 600
600
#5671B1
oklch(55.6% 0.105 265.8)
-
Step 700
700
#465E98
oklch(49% 0.098 265.9)
-
Step 800
800
#3A4D7B
oklch(42.7% 0.08 266.1)
-
Step 900
900
#314063
oklch(37.5% 0.063 265.8)
-
Step 950
950
#1D263A
oklch(27% 0.04 265.3)
#657FBB 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) | #6984BE | 0.015 |
| Deuteranopia (no green cones) | #607CBA | 0.011 |
| Tritanopia (no blue cones) | #448C95 | 0.087 |
| Achromatopsia (no color) | #808080 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #657FBB
#657FBB
oklch(60.2% 0.097 265.7)
- #9B7C35
#9B7C35
oklch(60.2% 0.097 85.4)
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 #657FBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.033
- Cool Blue #4984B8 ΔE 0.033
- Dusty Blue #5A86AD ΔE 0.035
- Steel Blue #4682B4 ΔE 0.037
- Faded Blue #658CBB ΔE 0.037
- Windows Blue #3778BF ΔE 0.055
- Stormy Blue #507B9C ΔE 0.056
- Lavender Gray #7E7F9A ΔE 0.059
Use #657FBB 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.