#737BD3
Closest named color: Soft Blue (#6488EA). oklch(61.6% 0.132 277.8), rgb(115, 123, 211).
Aa
Black text reads best on this color (5.50:1).
About this color
#737BD3 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.132 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.045 away. Black text reads best on it, at 5.50:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.50:1 |
| White text | 3.81:1 |
Values
| HEX | #737BD3 |
| RGB | rgb(115, 123, 211) |
| HSL | hsl(235, 52%, 64%) |
| OKLCH | oklch(61.6% 0.132 277.8) |
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 #737BD3 | 3.81:1 | AA large text | Lc -71.0 | Content text, not long reading |
| Black text on #737BD3 | 5.50:1 | AA | Lc 38.5 | Non-text elements, placeholder text |
| #737BD3 text on white | 3.81:1 | AA large text | Lc 65.5 | Content text, not long reading |
| #737BD3 text on black | 5.50:1 | AA | Lc -36.1 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F7
oklch(93.6% 0.019 276.3)
-
Step 200
200
#D3D7F1
oklch(88.4% 0.036 278.7)
-
Step 300
300
#B6BDEB
oklch(80.9% 0.065 278.1)
-
Step 400
400
#919AE1
oklch(70.7% 0.104 277.8)
-
Step 500
500 (this color)
#737BD3
oklch(61.6% 0.132 277.8)
-
Step 600
600
#6167C5
oklch(55.5% 0.144 277.9)
-
Step 700
700
#5155AB
oklch(49.1% 0.135 278.2)
-
Step 800
800
#42468A
oklch(42.6% 0.111 278.1)
-
Step 900
900
#373C6E
oklch(37.7% 0.085 277.2)
-
Step 950
950
#202341
oklch(27% 0.056 277.7)
#737BD3 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) | #5A86D6 | 0.038 |
| Deuteranopia (no green cones) | #527FD1 | 0.040 |
| Tritanopia (no blue cones) | #528D9D | 0.116 |
| Achromatopsia (no color) | #838383 | 0.133 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #737BD3
#737BD3
oklch(61.6% 0.132 277.8)
- #9A8500
#9A8500
oklch(61.7% 0.128 98)
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 #737BD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.045
- Medium Purple #9370DB ΔE 0.055
- Cornflower #6A79F7 ΔE 0.056
- Deep Lilac #966EBD ΔE 0.064
- Dark Sky Blue #448EE4 ΔE 0.065
- Medium Slate Blue #7B68EE ΔE 0.066
- Perrywinkle #8F8CE7 ΔE 0.066
- Faded Blue #658CBB ΔE 0.067
Use #737BD3 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.