#3B5FBA
Closest named color: Mid Blue (#276AB3). oklch(50.8% 0.149 265.2), rgb(59, 95, 186).
Aa
White text reads best on this color (5.94:1).
About this color
#3B5FBA is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.149 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.035 away. White text reads best on it, at 5.94:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.53:1 |
| White text | 5.94:1 |
Values
| HEX | #3B5FBA |
| RGB | rgb(59, 95, 186) |
| HSL | hsl(223, 52%, 48%) |
| OKLCH | oklch(50.8% 0.149 265.2) |
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 #3B5FBA | 5.94:1 | AA | Lc -84.6 | Fine for body text |
| Black text on #3B5FBA | 3.53:1 | AA large text | Lc 24.7 | Dividers and decoration only |
| #3B5FBA text on white | 5.94:1 | AA | Lc 79.4 | Fine for body text |
| #3B5FBA text on black | 3.53:1 | AA large text | Lc -22.4 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCD9F5
oklch(88.4% 0.041 265.7)
-
Step 300
300
#AAC0F0
oklch(80.8% 0.072 265.6)
-
Step 400
400
#7D9FE9
oklch(70.7% 0.115 264.8)
-
Step 500
500
#5D85E2
oklch(63.1% 0.147 265)
-
Step 600
600
#456CD0
oklch(55.6% 0.161 265.5)
-
Step 700
700 (this color)
#3B5FBA
oklch(50.8% 0.149 265.2)
-
Step 800
800
#2D4A92
oklch(42.7% 0.124 265.1)
-
Step 900
900
#283E74
oklch(37.6% 0.096 265.4)
-
Step 950
950
#182544
oklch(27% 0.061 265.4)
#3B5FBA 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) | #2D6ABD | 0.029 |
| Deuteranopia (no green cones) | #095EB8 | 0.033 |
| Tritanopia (no blue cones) | #007483 | 0.122 |
| Achromatopsia (no color) | #646464 | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B5FBA
#3B5FBA
oklch(50.8% 0.149 265.2)
- #816000
#816000
oklch(50.9% 0.104 85)
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 #3B5FBA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.035
- French Blue #436BAD ΔE 0.043
- Iris #6258C4 ΔE 0.055
- Warm Blue #4B57DB ΔE 0.059
- Dusky Blue #475F94 ΔE 0.062
- Denim Blue #3B5B92 ΔE 0.064
- Royal Blue #4169E1 ΔE 0.065
- Dark Periwinkle #665FD1 ΔE 0.067
Use #3B5FBA 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.