#3B5BDE
Closest named color: Warm Blue (#4B57DB). oklch(52.8% 0.203 268.1), rgb(59, 91, 222).
Aa
White text reads best on this color (5.61:1).
About this color
#3B5BDE is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.203 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.019 away. White text reads best on it, at 5.61:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.203) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.73:1 |
| White text | 5.61:1 |
Values
| HEX | #3B5BDE |
| RGB | rgb(59, 91, 222) |
| HSL | hsl(228, 71%, 55%) |
| OKLCH | oklch(52.8% 0.203 268.1) |
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 #3B5BDE | 5.61:1 | AA | Lc -82.8 | Fine for body text |
| Black text on #3B5BDE | 3.73:1 | AA large text | Lc 26.6 | Dividers and decoration only |
| #3B5BDE text on white | 5.61:1 | AA | Lc 77.5 | Fine for body text |
| #3B5BDE text on black | 3.73:1 | AA large text | Lc -24.3 | 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 600.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CBD9FC
oklch(88.6% 0.051 268.1)
-
Step 300
300
#A7BFFC
oklch(80.9% 0.091 267.7)
-
Step 400
400
#7A9BFB
oklch(70.7% 0.146 268.2)
-
Step 500
500
#5A7FF9
oklch(63.2% 0.186 268)
-
Step 600
600 (this color)
#3B5BDE
oklch(52.8% 0.203 268.1)
-
Step 700
700
#3552CA
oklch(49.2% 0.189 268.2)
-
Step 800
800
#2B44A3
oklch(42.7% 0.156 267.9)
-
Step 900
900
#263B81
oklch(37.8% 0.121 267.7)
-
Step 950
950
#16234C
oklch(27% 0.078 267.7)
#3B5BDE 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) | #006FE2 | 0.051 |
| Deuteranopia (no green cones) | #0060DB | 0.032 |
| Tritanopia (no blue cones) | #007C94 | 0.160 |
| Achromatopsia (no color) | #676767 | 0.203 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B5BDE
#3B5BDE
oklch(52.8% 0.203 268.1)
- #856700
#856700
oklch(52.9% 0.108 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 #3B5BDE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.019
- Azul #1D5DEC ΔE 0.030
- Neon Blue #4361EE ΔE 0.030
- Royal Blue #4169E1 ΔE 0.035
- Cerulean Blue #056EEE ΔE 0.052
- Bright Blue #0165FC ΔE 0.055
- Dark Periwinkle #665FD1 ΔE 0.060
- Electric Blue #0652FF ΔE 0.063
Use #3B5BDE 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.