#3758A0
Closest named color: Denim Blue (#3B5B92). oklch(47.3% 0.123 263.8), rgb(55, 88, 160).
Aa
White text reads best on this color (6.84:1).
About this color
#3758A0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 47%, its chroma 0.123 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Denim Blue (#3B5B92), ΔE 0.026 away. White text reads best on it, at 6.84:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Denim Blue (#3B5B92) |
| Black text | 3.06:1 |
| White text | 6.84:1 |
Values
| HEX | #3758A0 |
| RGB | rgb(55, 88, 160) |
| HSL | hsl(221, 49%, 42%) |
| OKLCH | oklch(47.3% 0.123 263.8) |
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 #3758A0 | 6.84:1 | AA | Lc -88.4 | Fine for body text |
| Black text on #3758A0 | 3.06:1 | AA large text | Lc 20.6 | Dividers and decoration only |
| #3758A0 text on white | 6.84:1 | AA | Lc 83.4 | Fine for body text |
| #3758A0 text on black | 3.06:1 | AA large text | Lc -18.5 | 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAF0
oklch(88.6% 0.033 262.7)
-
Step 300
300
#ADC1E8
oklch(80.9% 0.06 263.7)
-
Step 400
400
#82A0DC
oklch(70.7% 0.095 263.7)
-
Step 500
500
#6387D3
oklch(63% 0.122 264)
-
Step 600
600
#4A70C0
oklch(55.6% 0.132 263.5)
-
Step 700
700 (this color)
#3758A0
oklch(47.3% 0.123 263.8)
-
Step 800
800
#324C86
oklch(42.6% 0.102 264.3)
-
Step 900
900
#2B406B
oklch(37.6% 0.079 263.4)
-
Step 950
950
#1A263F
oklch(27.1% 0.05 263.9)
#3758A0 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) | #3660A3 | 0.022 |
| Deuteranopia (no green cones) | #24569F | 0.020 |
| Tritanopia (no blue cones) | #006874 | 0.101 |
| Achromatopsia (no color) | #5A5A5A | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3758A0
#3758A0
oklch(47.3% 0.123 263.8)
- #755600
#755600
oklch(47.3% 0.097 84.3)
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 #3758A0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Denim Blue #3B5B92 ΔE 0.026
- Dusky Blue #475F94 ΔE 0.037
- Dusk Blue #26538D ΔE 0.039
- Light Navy Blue #2E5A88 ΔE 0.043
- Twilight #4E518B ΔE 0.044
- Denim #3B638C ΔE 0.051
- Mid Blue #276AB3 ΔE 0.053
- Dusk #4E5481 ΔE 0.055
Use #3758A0 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.