#4357BB
Closest named color: Iris (#6258C4). oklch(49.7% 0.158 271), rgb(67, 87, 187).
Aa
White text reads best on this color (6.32:1).
About this color
#4357BB is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.158 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.046 away. White text reads best on it, at 6.32:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.31:1 |
| White text | 6.32:1 |
Values
| HEX | #4357BB |
| RGB | rgb(67, 87, 187) |
| HSL | hsl(230, 47%, 50%) |
| OKLCH | oklch(49.7% 0.158 271) |
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 #4357BB | 6.32:1 | AA | Lc -86.3 | Fine for body text |
| Black text on #4357BB | 3.31:1 | AA large text | Lc 22.9 | Dividers and decoration only |
| #4357BB text on white | 6.32:1 | AA | Lc 81.1 | Fine for body text |
| #4357BB text on black | 3.31:1 | AA large text | Lc -20.7 | Dividers and decoration only |
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 700.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CED8F6
oklch(88.4% 0.043 270.9)
-
Step 300
300
#AEBFF3
oklch(81% 0.076 270.6)
-
Step 400
400
#849BED
oklch(70.6% 0.123 271.1)
-
Step 500
500
#6780E7
oklch(63% 0.157 271)
-
Step 600
600
#5067D5
oklch(55.5% 0.17 271)
-
Step 700
700 (this color)
#4357BB
oklch(49.7% 0.158 271)
-
Step 800
800
#364696
oklch(42.7% 0.132 271.3)
-
Step 900
900
#2E3C77
oklch(37.7% 0.102 270.8)
-
Step 950
950
#1B2346
oklch(26.9% 0.066 271.6)
#4357BB 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) | #1465BF | 0.046 |
| Deuteranopia (no green cones) | #005AB9 | 0.045 |
| Tritanopia (no blue cones) | #006F80 | 0.134 |
| Achromatopsia (no color) | #606060 | 0.159 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4357BB
#4357BB
oklch(49.7% 0.158 271)
- #785F00
#785F00
oklch(49.6% 0.101 90.8)
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 #4357BB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.046
- Warm Blue #4B57DB ΔE 0.051
- Mid Blue #276AB3 ΔE 0.056
- French Blue #436BAD ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.063
- Slate Blue #6A5ACD ΔE 0.064
- Dark Periwinkle #665FD1 ΔE 0.064
- Bluey Purple #6241C7 ΔE 0.065
Use #4357BB 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.