#657EA7
Closest named color: Off Blue (#5684AE). oklch(59% 0.07 260.1), rgb(101, 126, 167).
Aa
Black text reads best on this color (5.09:1).
About this color
#657EA7 is a medium-dark, muted blue. In OKLCH its lightness is 59%, its chroma 0.070 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.022 away. Black text reads best on it, at 5.09:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | muted (0.070) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.09:1 |
| White text | 4.12:1 |
Values
| HEX | #657EA7 |
| RGB | rgb(101, 126, 167) |
| HSL | hsl(217, 27%, 53%) |
| OKLCH | oklch(59% 0.07 260.1) |
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 #657EA7 | 4.12:1 | AA large text | Lc -73.8 | Content text, not long reading |
| Black text on #657EA7 | 5.09:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #657EA7 text on white | 4.12:1 | AA large text | Lc 68.3 | Content text, not long reading |
| #657EA7 text on black | 5.09:1 | AA | Lc -33.4 | 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 600.
-
Step 50
50
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E6EAF0
oklch(93.6% 0.009 258.3)
-
Step 200
200
#D3DAE5
oklch(88.6% 0.017 259.4)
-
Step 300
300
#B5C1D5
oklch(80.8% 0.031 260.7)
-
Step 400
400
#8FA2C0
oklch(70.8% 0.049 259.5)
-
Step 500
500
#738AB1
oklch(63% 0.065 260.8)
-
Step 600
600 (this color)
#657EA7
oklch(59% 0.07 260.1)
-
Step 700
700
#4B6186
oklch(49.1% 0.066 260.6)
-
Step 800
800
#3E4F6D
oklch(42.6% 0.055 261.5)
-
Step 900
900
#354258
oklch(37.7% 0.042 260.8)
-
Step 950
950
#1F2734
oklch(27.1% 0.027 260)
#657EA7 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) | #6F80A9 | 0.015 |
| Deuteranopia (no green cones) | #687AA6 | 0.011 |
| Tritanopia (no blue cones) | #4F878C | 0.062 |
| Achromatopsia (no color) | #7D7D7D | 0.070 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #657EA7
#657EA7
oklch(59% 0.07 260.1)
- #93794C
#93794C
oklch(59% 0.07 80.5)
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 #657EA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.022
- Dusty Blue #5A86AD ΔE 0.024
- Stormy Blue #507B9C ΔE 0.033
- Steel Blue #4682B4 ΔE 0.036
- Cool Blue #4984B8 ΔE 0.037
- Grey Blue #647D8E ΔE 0.039
- Lavender Gray #7E7F9A ΔE 0.039
- Slate Gray #708090 ΔE 0.040
Use #657EA7 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.