#657FEF
Closest named color: Cornflower (#6A79F7). oklch(63.2% 0.17 271), rgb(101, 127, 239).
Aa
Black text reads best on this color (5.83:1).
About this color
#657FEF is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.170 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.021 away. Black text reads best on it, at 5.83:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.83:1 |
| White text | 3.59:1 |
Values
| HEX | #657FEF |
| RGB | rgb(101, 127, 239) |
| HSL | hsl(229, 81%, 67%) |
| OKLCH | oklch(63.2% 0.17 271) |
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 #657FEF | 3.59:1 | AA large text | Lc -68.8 | Content text, not long reading |
| Black text on #657FEF | 5.83:1 | AA | Lc 40.7 | Non-text elements, placeholder text |
| #657FEF text on white | 3.59:1 | AA large text | Lc 63.3 | Content text, not long reading |
| #657FEF text on black | 5.83:1 | AA | Lc -38.4 | 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 500.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CED8F9
oklch(88.5% 0.047 272.1)
-
Step 300
300
#ADBEF7
oklch(80.9% 0.083 271.6)
-
Step 400
400
#829BF3
oklch(70.7% 0.132 270.7)
-
Step 500
500 (this color)
#657FEF
oklch(63.2% 0.17 271)
-
Step 600
600
#4E65DD
oklch(55.6% 0.184 271)
-
Step 700
700
#3F53C0
oklch(49.1% 0.172 270.9)
-
Step 800
800
#34459B
oklch(42.7% 0.141 270.8)
-
Step 900
900
#2D3B7B
oklch(37.7% 0.11 271)
-
Step 950
950
#1A2348
oklch(27% 0.07 270.8)
#657FEF 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) | #498DF3 | 0.041 |
| Deuteranopia (no green cones) | #3381ED | 0.046 |
| Tritanopia (no blue cones) | #0098AB | 0.150 |
| Achromatopsia (no color) | #878787 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #657FEF
#657FEF
oklch(63.2% 0.17 271)
- #A78500
#A78500
oklch(63.1% 0.129 90.6)
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 #657FEF, closest first.
No curated palette has a color within ΔE 0.04 of #657FEF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.021
- Soft Blue #6488EA ΔE 0.025
- Dark Sky Blue #448EE4 ΔE 0.052
- Cornflower Blue #6495ED ΔE 0.058
- Medium Slate Blue #7B68EE ΔE 0.058
- Lavender Blue #8B88F8 ΔE 0.059
- Chefchaouen Blue #4895EF ΔE 0.059
- Periwinkle #8E82FE ΔE 0.061
Use #657FEF 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.