#3B5FC3
Closest named color: Mid Blue (#276AB3). oklch(51.5% 0.162 266), rgb(59, 95, 195).
Aa
White text reads best on this color (5.81:1).
About this color
#3B5FC3 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.162 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.043 away. White text reads best on it, at 5.81:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.162) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.61:1 |
| White text | 5.81:1 |
Values
| HEX | #3B5FC3 |
| RGB | rgb(59, 95, 195) |
| HSL | hsl(224, 54%, 50%) |
| OKLCH | oklch(51.5% 0.162 266) |
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 #3B5FC3 | 5.81:1 | AA | Lc -84.0 | Fine for body text |
| Black text on #3B5FC3 | 3.61:1 | AA large text | Lc 25.3 | Dividers and decoration only |
| #3B5FC3 text on white | 5.81:1 | AA | Lc 78.7 | Fine for body text |
| #3B5FC3 text on black | 3.61:1 | AA large text | Lc -23.1 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F7
oklch(88.5% 0.044 266.9)
-
Step 300
300
#A9C0F4
oklch(80.9% 0.078 266.1)
-
Step 400
400
#7C9EEF
oklch(70.8% 0.125 266)
-
Step 500
500
#5B83E9
oklch(63% 0.16 265.9)
-
Step 600
600
#436AD8
oklch(55.6% 0.174 266.1)
-
Step 700
700 (this color)
#3B5FC3
oklch(51.5% 0.162 266)
-
Step 800
800
#2C4897
oklch(42.6% 0.134 266.1)
-
Step 900
900
#273D78
oklch(37.6% 0.104 266.1)
-
Step 950
950
#172447
oklch(26.9% 0.068 266.6)
#3B5FC3 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) | #216CC7 | 0.036 |
| Deuteranopia (no green cones) | #005FC1 | 0.034 |
| Tritanopia (no blue cones) | #007788 | 0.131 |
| Achromatopsia (no color) | #656565 | 0.162 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B5FC3
#3B5FC3
oklch(51.5% 0.162 266)
- #826200
#826200
oklch(51.5% 0.105 86.2)
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 #3B5FC3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.043
- Warm Blue #4B57DB ΔE 0.046
- Iris #6258C4 ΔE 0.051
- Royal Blue #4169E1 ΔE 0.052
- French Blue #436BAD ΔE 0.052
- Dark Periwinkle #665FD1 ΔE 0.060
- Slate Blue #6A5ACD ΔE 0.064
- Azul #1D5DEC ΔE 0.067
Use #3B5FC3 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.