#3B5ACF
Closest named color: Warm Blue (#4B57DB). oklch(51.4% 0.184 268), rgb(59, 90, 207).
Aa
White text reads best on this color (5.91:1).
About this color
#3B5ACF is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.184 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.027 away. White text reads best on it, at 5.91:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.184) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.54:1 |
| White text | 5.91:1 |
Values
| HEX | #3B5ACF |
| RGB | rgb(59, 90, 207) |
| HSL | hsl(227, 61%, 52%) |
| OKLCH | oklch(51.4% 0.184 268) |
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 #3B5ACF | 5.91:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #3B5ACF | 3.54:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #3B5ACF text on white | 5.91:1 | AA | Lc 79.1 | Fine for body text |
| #3B5ACF text on black | 3.54:1 | AA large text | Lc -22.7 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CBD9FB
oklch(88.6% 0.049 267.7)
-
Step 300
300
#A8BFFB
oklch(80.9% 0.089 268.2)
-
Step 400
400
#7A9BF9
oklch(70.6% 0.143 268)
-
Step 500
500
#5B7FF6
oklch(63.1% 0.182 268.2)
-
Step 600
600
#4365E5
oklch(55.6% 0.198 268)
-
Step 700
700 (this color)
#3B5ACF
oklch(51.4% 0.184 268)
-
Step 800
800
#2C45A1
oklch(42.8% 0.152 267.9)
-
Step 900
900
#273B80
oklch(37.7% 0.119 268.1)
-
Step 950
950
#17234B
oklch(27% 0.076 268.4)
#3B5ACF 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) | #006BD3 | 0.047 |
| Deuteranopia (no green cones) | #005DCD | 0.034 |
| Tritanopia (no blue cones) | #00778C | 0.147 |
| Achromatopsia (no color) | #646464 | 0.185 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B5ACF
#3B5ACF
oklch(51.4% 0.184 268)
- #806300
#806300
oklch(51.4% 0.105 88.5)
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 #3B5ACF, closest first.
No curated palette has a color within ΔE 0.04 of #3B5ACF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.027
- Royal Blue #4169E1 ΔE 0.046
- Azul #1D5DEC ΔE 0.049
- Neon Blue #4361EE ΔE 0.052
- Iris #6258C4 ΔE 0.053
- Dark Periwinkle #665FD1 ΔE 0.059
- Slate Blue #6A5ACD ΔE 0.063
- Mid Blue #276AB3 ΔE 0.065
Use #3B5ACF 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.