#3756CC
Closest named color: Warm Blue (#4B57DB). oklch(50.2% 0.186 267.8), rgb(55, 86, 204).
Aa
White text reads best on this color (6.23:1).
About this color
#3756CC is a medium-dark, vivid blue. In OKLCH its lightness is 50%, its chroma 0.186 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.034 away. White text reads best on it, at 6.23:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.36:1 |
| White text | 6.23:1 |
Values
| HEX | #3756CC |
| RGB | rgb(55, 86, 204) |
| HSL | hsl(228, 59%, 51%) |
| OKLCH | oklch(50.2% 0.186 267.8) |
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 #3756CC | 6.23:1 | AA | Lc -85.7 | Fine for body text |
| Black text on #3756CC | 3.36:1 | AA large text | Lc 23.5 | Dividers and decoration only |
| #3756CC text on white | 6.23:1 | AA | Lc 80.6 | Fine for body text |
| #3756CC text on black | 3.36:1 | AA large text | Lc -21.3 | 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 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
#A7BFFC
oklch(80.9% 0.091 267.7)
-
Step 400
400
#7A9BFA
oklch(70.6% 0.144 268.1)
-
Step 500
500
#5A7FF7
oklch(63.1% 0.184 267.9)
-
Step 600
600
#4265E6
oklch(55.6% 0.199 267.8)
-
Step 700
700 (this color)
#3756CC
oklch(50.2% 0.186 267.8)
-
Step 800
800
#2B44A2
oklch(42.6% 0.155 267.9)
-
Step 900
900
#263B80
oklch(37.7% 0.119 267.6)
-
Step 950
950
#16234B
oklch(26.9% 0.076 267.6)
#3756CC 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) | #0068D0 | 0.047 |
| Deuteranopia (no green cones) | #005ACA | 0.031 |
| Tritanopia (no blue cones) | #007388 | 0.148 |
| Achromatopsia (no color) | #616161 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3756CC
#3756CC
oklch(50.2% 0.186 267.8)
- #7C5F00
#7C5F00
oklch(50.1% 0.102 87.8)
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 #3756CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.034
- Azul #1D5DEC ΔE 0.053
- Blue Blue #2242C7 ΔE 0.055
- Royal Blue #4169E1 ΔE 0.058
- Iris #6258C4 ΔE 0.059
- Neon Blue #4361EE ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Majorelle Blue #3F37C9 ΔE 0.065
Use #3756CC 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.