#4151CB
Closest named color: Warm Blue (#4B57DB). oklch(49.7% 0.188 271.9), rgb(65, 81, 203).
Aa
White text reads best on this color (6.43:1).
About this color
#4151CB is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.188 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.032 away. White text reads best on it, at 6.43:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.26:1 |
| White text | 6.43:1 |
Values
| HEX | #4151CB |
| RGB | rgb(65, 81, 203) |
| HSL | hsl(233, 57%, 53%) |
| OKLCH | oklch(49.7% 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 #4151CB | 6.43:1 | AA | Lc -86.6 | Fine for body text |
| Black text on #4151CB | 3.26:1 | AA large text | Lc 22.6 | Dividers and decoration only |
| #4151CB text on white | 6.43:1 | AA | Lc 81.4 | Fine for body text |
| #4151CB text on black | 3.26:1 | AA large text | Lc -20.4 | 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
#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
#ACBEFC
oklch(81% 0.09 271.8)
-
Step 400
400
#8199FB
oklch(70.7% 0.146 271.8)
-
Step 500
500
#647CF8
oklch(63.1% 0.186 271.8)
-
Step 600
600
#4E61E7
oklch(55.6% 0.202 272)
-
Step 700
700 (this color)
#4151CB
oklch(49.7% 0.188 271.9)
-
Step 800
800
#3442A2
oklch(42.7% 0.155 271.8)
-
Step 900
900
#2D3981
oklch(37.8% 0.121 272.2)
-
Step 950
950
#1A224B
oklch(27% 0.076 272.1)
#4151CB 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) | #0065CF | 0.056 |
| Deuteranopia (no green cones) | #0058C9 | 0.043 |
| Tritanopia (no blue cones) | #007086 | 0.154 |
| Achromatopsia (no color) | #5F5F5F | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4151CB
#4151CB
oklch(49.7% 0.188 271.9)
- #776000
#776000
oklch(49.8% 0.102 92.4)
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 #4151CB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.032
- Blue With A Hint Of Purple #533CC6 ΔE 0.048
- Blurple #5539CC ΔE 0.052
- Blue Blue #2242C7 ΔE 0.052
- Iris #6258C4 ΔE 0.053
- Majorelle Blue #3F37C9 ΔE 0.055
- Bluey Purple #6241C7 ΔE 0.056
- Azul #1D5DEC ΔE 0.061
Use #4151CB 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.