#657FDD
Closest named color: Soft Blue (#6488EA). oklch(62% 0.145 270.1), rgb(101, 127, 221).
Aa
Black text reads best on this color (5.63:1).
About this color
#657FDD is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.145 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.028 away. Black text reads best on it, at 5.63:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.63:1 |
| White text | 3.72:1 |
Values
| HEX | #657FDD |
| RGB | rgb(101, 127, 221) |
| HSL | hsl(227, 64%, 63%) |
| OKLCH | oklch(62% 0.145 270.1) |
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 #657FDD | 3.72:1 | AA large text | Lc -70.2 | Content text, not long reading |
| Black text on #657FDD | 5.63:1 | AA | Lc 39.4 | Non-text elements, placeholder text |
| #657FDD text on white | 3.72:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #657FDD text on black | 5.63:1 | AA | Lc -37.0 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E4EAF8
oklch(93.7% 0.02 267.3)
-
Step 200
200
#CFD9F4
oklch(88.6% 0.039 269.4)
-
Step 300
300
#AFBFEF
oklch(80.9% 0.07 270.4)
-
Step 400
400
#859DE8
oklch(70.8% 0.114 269.8)
-
Step 500
500 (this color)
#657FDD
oklch(62% 0.145 270.1)
-
Step 600
600
#516ACE
oklch(55.7% 0.157 270.1)
-
Step 700
700
#4257B3
oklch(49% 0.148 270.4)
-
Step 800
800
#364891
oklch(42.7% 0.122 270.1)
-
Step 900
900
#2E3D73
oklch(37.6% 0.094 269.8)
-
Step 950
950
#1B2444
oklch(27% 0.061 270.1)
#657FDD 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) | #578AE1 | 0.030 |
| Deuteranopia (no green cones) | #487FDB | 0.031 |
| Tritanopia (no blue cones) | #2494A3 | 0.131 |
| Achromatopsia (no color) | #848484 | 0.145 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #657FDD
#657FDD
oklch(62% 0.145 270.1)
- #A48200
#A48200
oklch(62.1% 0.127 90.2)
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 #657FDD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.028
- Cornflower #6A79F7 ΔE 0.044
- Dark Sky Blue #448EE4 ΔE 0.046
- Cornflower Blue #6495ED ΔE 0.059
- Chefchaouen Blue #4895EF ΔE 0.061
- Medium Slate Blue #7B68EE ΔE 0.068
- Faded Blue #658CBB ΔE 0.070
- Cool Blue #4984B8 ΔE 0.070
Use #657FDD 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.