#4B5FBC
Closest named color: Iris (#6258C4). oklch(51.8% 0.147 271.3), rgb(75, 95, 188).
Aa
White text reads best on this color (5.73:1).
About this color
#4B5FBC is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.147 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Iris (#6258C4), ΔE 0.037 away. White text reads best on it, at 5.73:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Iris (#6258C4) |
| Black text | 3.66:1 |
| White text | 5.73:1 |
Values
| HEX | #4B5FBC |
| RGB | rgb(75, 95, 188) |
| HSL | hsl(229, 46%, 52%) |
| OKLCH | oklch(51.8% 0.147 271.3) |
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 #4B5FBC | 5.73:1 | AA | Lc -83.7 | Fine for body text |
| Black text on #4B5FBC | 3.66:1 | AA large text | Lc 25.6 | Dividers and decoration only |
| #4B5FBC text on white | 5.73:1 | AA | Lc 78.4 | Fine for body text |
| #4B5FBC text on black | 3.66:1 | AA large text | Lc -23.4 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#CFD8F4
oklch(88.4% 0.04 271.4)
-
Step 300
300
#B0BFF0
oklch(81% 0.071 271.5)
-
Step 400
400
#879CE8
oklch(70.7% 0.114 271.5)
-
Step 500
500
#6A82E1
oklch(63.2% 0.145 271.1)
-
Step 600
600
#5369CF
oklch(55.6% 0.159 271.2)
-
Step 700
700 (this color)
#4B5FBC
oklch(51.8% 0.147 271.3)
-
Step 800
800
#384791
oklch(42.6% 0.123 271.7)
-
Step 900
900
#303D74
oklch(37.9% 0.095 271.2)
-
Step 950
950
#1C2444
oklch(27.1% 0.06 271.3)
#4B5FBC 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) | #2F6BBF | 0.038 |
| Deuteranopia (no green cones) | #1961BA | 0.044 |
| Tritanopia (no blue cones) | #007484 | 0.128 |
| Achromatopsia (no color) | #666666 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B5FBC
#4B5FBC
oklch(51.8% 0.147 271.3)
- #7F6500
#7F6500
oklch(51.8% 0.106 91)
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 #4B5FBC, closest first.
No curated palette has a color within ΔE 0.04 of #4B5FBC.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Iris #6258C4 ΔE 0.037
- French Blue #436BAD ΔE 0.044
- Mid Blue #276AB3 ΔE 0.046
- Dark Periwinkle #665FD1 ΔE 0.050
- Slate Blue #6A5ACD ΔE 0.053
- Warm Blue #4B57DB ΔE 0.053
- Light Indigo #6D5ACF ΔE 0.058
- Royal Blue #4169E1 ΔE 0.060
Use #4B5FBC 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.