#3755BF
Closest named color: Warm Blue (#4B57DB). oklch(49% 0.17 267.7), rgb(55, 85, 191).
Aa
White text reads best on this color (6.53:1).
About this color
#3755BF is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.170 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.051 away. White text reads best on it, at 6.53:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.21:1 |
| White text | 6.53:1 |
Values
| HEX | #3755BF |
| RGB | rgb(55, 85, 191) |
| HSL | hsl(227, 55%, 48%) |
| OKLCH | oklch(49% 0.17 267.7) |
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 #3755BF | 6.53:1 | AA | Lc -87.0 | Fine for body text |
| Black text on #3755BF | 3.21:1 | AA large text | Lc 22.1 | Dividers and decoration only |
| #3755BF text on white | 6.53:1 | AA | Lc 81.9 | Fine for body text |
| #3755BF text on black | 3.21:1 | AA large text | Lc -20.0 | 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
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#A9BFF7
oklch(80.8% 0.083 267.9)
-
Step 400
400
#7D9CF3
oklch(70.6% 0.132 268.1)
-
Step 500
500
#5D81EE
oklch(63% 0.168 267.7)
-
Step 600
600
#4568DD
oklch(55.7% 0.183 267.5)
-
Step 700
700 (this color)
#3755BF
oklch(49% 0.17 267.7)
-
Step 800
800
#2E479B
oklch(42.8% 0.14 267.6)
-
Step 900
900
#283C7B
oklch(37.6% 0.11 267.6)
-
Step 950
950
#182448
oklch(27.1% 0.069 267.8)
#3755BF 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) | #0064C3 | 0.043 |
| Deuteranopia (no green cones) | #0058BD | 0.032 |
| Tritanopia (no blue cones) | #006F81 | 0.138 |
| Achromatopsia (no color) | #5E5E5E | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3755BF
#3755BF
oklch(49% 0.17 267.7)
- #785C00
#785C00
oklch(49% 0.1 87.9)
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 #3755BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.051
- Blue Blue #2242C7 ΔE 0.054
- Iris #6258C4 ΔE 0.060
- Mid Blue #276AB3 ΔE 0.061
- Blue With A Hint Of Purple #533CC6 ΔE 0.062
- Majorelle Blue #3F37C9 ΔE 0.065
- Blurple #5539CC ΔE 0.069
- Bluey Purple #6241C7 ΔE 0.071
Use #3755BF 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.