#4B5BCC
Closest named color: Warm Blue (#4B57DB). oklch(52.2% 0.174 272.8), rgb(75, 91, 204).
Aa
White text reads best on this color (5.72:1).
About this color
#4B5BCC is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.174 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.025 away. White text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.66:1 |
| White text | 5.72:1 |
Values
| HEX | #4B5BCC |
| RGB | rgb(75, 91, 204) |
| HSL | hsl(233, 56%, 55%) |
| OKLCH | oklch(52.2% 0.174 272.8) |
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 #4B5BCC | 5.72:1 | AA | Lc -83.5 | Fine for body text |
| Black text on #4B5BCC | 3.66:1 | AA large text | Lc 25.8 | Dividers and decoration only |
| #4B5BCC text on white | 5.72:1 | AA | Lc 78.3 | Fine for body text |
| #4B5BCC text on black | 3.66:1 | AA large text | Lc -23.5 | 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
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CED8F9
oklch(88.5% 0.047 272.1)
-
Step 300
300
#AEBEF8
oklch(81% 0.084 272.5)
-
Step 400
400
#859AF4
oklch(70.8% 0.134 272.6)
-
Step 500
500
#687DF0
oklch(63% 0.173 272.7)
-
Step 600
600
#5263DF
oklch(55.6% 0.188 272.8)
-
Step 700
700 (this color)
#4B5BCC
oklch(52.2% 0.174 272.8)
-
Step 800
800
#37439C
oklch(42.6% 0.144 272.9)
-
Step 900
900
#2F3A7C
oklch(37.7% 0.112 272.8)
-
Step 950
950
#1B2249
oklch(26.9% 0.072 272.9)
#4B5BCC 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) | #006CD0 | 0.057 |
| Deuteranopia (no green cones) | #0061CA | 0.051 |
| Tritanopia (no blue cones) | #00768B | 0.146 |
| Achromatopsia (no color) | #666666 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4B5BCC
#4B5BCC
oklch(52.2% 0.174 272.8)
- #7F6700
#7F6700
oklch(52.2% 0.107 92.8)
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 #4B5BCC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.025
- Iris #6258C4 ΔE 0.034
- Dark Periwinkle #665FD1 ΔE 0.041
- Slate Blue #6A5ACD ΔE 0.044
- Royal Blue #4169E1 ΔE 0.045
- Light Indigo #6D5ACF ΔE 0.049
- Neon Blue #4361EE ΔE 0.053
- Azul #1D5DEC ΔE 0.062
Use #4B5BCC 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.