#737BCB
Closest named color: Soft Blue (#6488EA). oklch(61.1% 0.121 277.9), rgb(115, 123, 203).
Aa
Black text reads best on this color (5.42:1).
About this color
#737BCB is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.121 and its hue 278°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.053 away. Black text reads best on it, at 5.42:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.42:1 |
| White text | 3.87:1 |
Values
| HEX | #737BCB |
| RGB | rgb(115, 123, 203) |
| HSL | hsl(235, 46%, 62%) |
| OKLCH | oklch(61.1% 0.121 277.9) |
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 #737BCB | 3.87:1 | AA large text | Lc -71.6 | Content text, not long reading |
| Black text on #737BCB | 5.42:1 | AA | Lc 38.0 | Non-text elements, placeholder text |
| #737BCB text on white | 3.87:1 | AA large text | Lc 66.1 | Content text, not long reading |
| #737BCB text on black | 5.42:1 | AA | Lc -35.6 | 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
#E7E9F6
oklch(93.6% 0.018 279.1)
-
Step 200
200
#D3D8EF
oklch(88.5% 0.032 276)
-
Step 300
300
#B7BEE7
oklch(81% 0.058 277.4)
-
Step 400
400
#929BDB
oklch(70.7% 0.094 277.5)
-
Step 500
500 (this color)
#737BCB
oklch(61.1% 0.121 277.9)
-
Step 600
600
#6269BF
oklch(55.6% 0.132 277.7)
-
Step 700
700
#5257A4
oklch(49.1% 0.122 278.1)
-
Step 800
800
#434885
oklch(42.8% 0.1 277.7)
-
Step 900
900
#383C6B
oklch(37.6% 0.08 278.1)
-
Step 950
950
#21243E
oklch(27.1% 0.048 277.6)
#737BCB 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) | #5E85CE | 0.034 |
| Deuteranopia (no green cones) | #587EC9 | 0.034 |
| Tritanopia (no blue cones) | #568B99 | 0.106 |
| Achromatopsia (no color) | #818181 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #737BCB
#737BCB
oklch(61.1% 0.121 277.9)
- #978314
#978314
oklch(61% 0.121 97.8)
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 #737BCB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.053
- Faded Blue #658CBB ΔE 0.059
- Deep Lilac #966EBD ΔE 0.060
- Medium Purple #9370DB ΔE 0.060
- Cool Blue #4984B8 ΔE 0.064
- Off Blue #5684AE ΔE 0.067
- Cornflower #6A79F7 ΔE 0.068
- Steel Blue #4682B4 ΔE 0.069
Use #737BCB 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.