#3B59CB
Closest named color: Warm Blue (#4B57DB). oklch(50.9% 0.18 268.2), rgb(59, 89, 203).
Aa
White text reads best on this color (6.03:1).
About this color
#3B59CB is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.180 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.031 away. White text reads best on it, at 6.03:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.180) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.47:1 |
| White text | 6.03:1 |
Values
| HEX | #3B59CB |
| RGB | rgb(59, 89, 203) |
| HSL | hsl(228, 58%, 51%) |
| OKLCH | oklch(50.9% 0.18 268.2) |
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 #3B59CB | 6.03:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #3B59CB | 3.47:1 | AA large text | Lc 24.4 | Dividers and decoration only |
| #3B59CB text on white | 6.03:1 | AA | Lc 79.7 | Fine for body text |
| #3B59CB text on black | 3.47:1 | AA large text | Lc -22.1 | 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
#E3EAFB
oklch(93.7% 0.024 267.9)
-
Step 200
200
#CBD9FA
oklch(88.5% 0.048 267.2)
-
Step 300
300
#A9BFFA
oklch(80.9% 0.087 268.6)
-
Step 400
400
#7C9CF7
oklch(70.8% 0.138 268.1)
-
Step 500
500
#5C80F4
oklch(63.2% 0.178 268.1)
-
Step 600
600
#4466E3
oklch(55.7% 0.194 268)
-
Step 700
700 (this color)
#3B59CB
oklch(50.9% 0.18 268.2)
-
Step 800
800
#2D459F
oklch(42.7% 0.149 268.1)
-
Step 900
900
#283B7E
oklch(37.6% 0.116 268.4)
-
Step 950
950
#17234A
oklch(26.9% 0.074 268.3)
#3B59CB 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) | #006ACF | 0.047 |
| Deuteranopia (no green cones) | #005CC9 | 0.034 |
| Tritanopia (no blue cones) | #007589 | 0.145 |
| Achromatopsia (no color) | #636363 | 0.180 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B59CB
#3B59CB
oklch(50.9% 0.18 268.2)
- #7E6100
#7E6100
oklch(50.8% 0.104 88.1)
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 #3B59CB, closest first.
No curated palette has a color within ΔE 0.04 of #3B59CB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.031
- Royal Blue #4169E1 ΔE 0.052
- Iris #6258C4 ΔE 0.052
- Azul #1D5DEC ΔE 0.054
- Neon Blue #4361EE ΔE 0.058
- Dark Periwinkle #665FD1 ΔE 0.061
- Mid Blue #276AB3 ΔE 0.062
- Blue Blue #2242C7 ΔE 0.063
Use #3B59CB 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.