#657DFB
Closest named color: Cornflower (#6A79F7). oklch(63.6% 0.188 271.9), rgb(101, 125, 251).
Aa
Black text reads best on this color (5.87:1).
About this color
#657DFB is a medium-light, vivid blue. In OKLCH its lightness is 64%, its chroma 0.188 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower (#6A79F7), ΔE 0.011 away. Black text reads best on it, at 5.87:1.
| Hue family | Blues |
| Lightness | medium-light (64%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Cornflower (#6A79F7) |
| Black text | 5.87:1 |
| White text | 3.57:1 |
Values
| HEX | #657DFB |
| RGB | rgb(101, 125, 251) |
| HSL | hsl(230, 95%, 69%) |
| OKLCH | oklch(63.6% 0.188 271.9) |
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 #657DFB | 3.57:1 | AA large text | Lc -68.5 | Content text, not long reading |
| Black text on #657DFB | 5.87:1 | AA | Lc 41.1 | Non-text elements, placeholder text |
| #657DFB text on white | 3.57:1 | AA large text | Lc 63.0 | Content text, not long reading |
| #657DFB text on black | 5.87:1 | AA | Lc -38.7 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FC
oklch(93.5% 0.027 271.9)
-
Step 200
200
#CDD8FC
oklch(88.5% 0.051 271.9)
-
Step 300
300
#ABBDFD
oklch(80.8% 0.093 272.1)
-
Step 400
400
#8199FC
oklch(70.8% 0.147 271.9)
-
Step 500
500 (this color)
#657DFB
oklch(63.6% 0.188 271.9)
-
Step 600
600
#4E61E8
oklch(55.7% 0.203 271.9)
-
Step 700
700
#3F4FCA
oklch(49.1% 0.19 271.8)
-
Step 800
800
#3441A3
oklch(42.6% 0.158 272.1)
-
Step 900
900
#2C3982
oklch(37.8% 0.123 271.6)
-
Step 950
950
#1A224C
oklch(27.1% 0.078 272.1)
#657DFB 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) | #378EFF | 0.053 |
| Deuteranopia (no green cones) | #0E81F8 | 0.061 |
| Tritanopia (no blue cones) | #009AB0 | 0.163 |
| Achromatopsia (no color) | #878787 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #657DFB
#657DFB
oklch(63.6% 0.188 271.9)
- #A78700
#A78700
oklch(63.5% 0.13 92)
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 #657DFB, closest first.
No curated palette has a color within ΔE 0.04 of #657DFB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower #6A79F7 ΔE 0.011
- Soft Blue #6488EA ΔE 0.040
- Medium Slate Blue #7B68EE ΔE 0.055
- Clear Blue #247AFD ΔE 0.058
- Periwinkle #8E82FE ΔE 0.058
- Lavender Blue #8B88F8 ΔE 0.061
- Dodger Blue #1E90FF ΔE 0.064
- Dark Sky Blue #448EE4 ΔE 0.065
Use #657DFB 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.