#3B5DCB
Closest named color: Warm Blue (#4B57DB). oklch(51.7% 0.175 267.1), rgb(59, 93, 203).
Aa
White text reads best on this color (5.81:1).
About this color
#3B5DCB is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.175 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.033 away. White text reads best on it, at 5.81:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.175) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.61:1 |
| White text | 5.81:1 |
Values
| HEX | #3B5DCB |
| RGB | rgb(59, 93, 203) |
| HSL | hsl(226, 58%, 51%) |
| OKLCH | oklch(51.7% 0.175 267.1) |
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 #3B5DCB | 5.81:1 | AA | Lc -83.9 | Fine for body text |
| Black text on #3B5DCB | 3.61:1 | AA large text | Lc 25.4 | Dividers and decoration only |
| #3B5DCB text on white | 5.81:1 | AA | Lc 78.6 | Fine for body text |
| #3B5DCB text on black | 3.61:1 | AA large text | Lc -23.2 | 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
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9F9
oklch(88.5% 0.047 266.7)
-
Step 300
300
#A8C0F8
oklch(81% 0.084 266.5)
-
Step 400
400
#7B9CF5
oklch(70.6% 0.136 267.5)
-
Step 500
500
#5A81F1
oklch(63.1% 0.173 267)
-
Step 600
600
#4267E0
oklch(55.6% 0.189 267.1)
-
Step 700
700 (this color)
#3B5DCB
oklch(51.7% 0.175 267.1)
-
Step 800
800
#2B469D
oklch(42.6% 0.145 267)
-
Step 900
900
#273C7D
oklch(37.7% 0.113 267.3)
-
Step 950
950
#172449
oklch(27.1% 0.071 267.1)
#3B5DCB 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) | #006CCF | 0.043 |
| Deuteranopia (no green cones) | #005FC9 | 0.033 |
| Tritanopia (no blue cones) | #00788B | 0.141 |
| Achromatopsia (no color) | #656565 | 0.175 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3B5DCB
#3B5DCB
oklch(51.7% 0.175 267.1)
- #826300
#826300
oklch(51.7% 0.106 87.1)
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 #3B5DCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.033
- Royal Blue #4169E1 ΔE 0.045
- Iris #6258C4 ΔE 0.051
- Azul #1D5DEC ΔE 0.054
- Mid Blue #276AB3 ΔE 0.056
- Neon Blue #4361EE ΔE 0.056
- Dark Periwinkle #665FD1 ΔE 0.057
- Slate Blue #6A5ACD ΔE 0.062
Use #3B5DCB 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.