#737BB5
Closest named color: Off Blue (#5684AE). oklch(60% 0.089 277.3), rgb(115, 123, 181).
Aa
Black text reads best on this color (5.22:1).
About this color
#737BB5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.089 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Off Blue (#5684AE), ΔE 0.045 away. Black text reads best on it, at 5.22:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Off Blue (#5684AE) |
| Black text | 5.22:1 |
| White text | 4.01:1 |
Values
| HEX | #737BB5 |
| RGB | rgb(115, 123, 181) |
| HSL | hsl(233, 31%, 58%) |
| OKLCH | oklch(60% 0.089 277.3) |
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 #737BB5 | 4.01:1 | AA large text | Lc -72.9 | Content text, not long reading |
| Black text on #737BB5 | 5.22:1 | AA | Lc 36.7 | Non-text elements, placeholder text |
| #737BB5 text on white | 4.01:1 | AA large text | Lc 67.4 | Content text, not long reading |
| #737BB5 text on black | 5.22:1 | AA | Lc -34.3 | 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
#F4F5F9
oklch(97.1% 0.005 275)
-
Step 100
100
#E7E9F2
oklch(93.5% 0.012 276.1)
-
Step 200
200
#D5D8E9
oklch(88.5% 0.023 277.9)
-
Step 300
300
#B9BFDD
oklch(81% 0.043 276.5)
-
Step 400
400
#959DCC
oklch(70.7% 0.069 277)
-
Step 500
500 (this color)
#737BB5
oklch(60% 0.089 277.3)
-
Step 600
600
#666DAB
oklch(55.6% 0.096 277.9)
-
Step 700
700
#545B93
oklch(49.1% 0.09 277.1)
-
Step 800
800
#454B77
oklch(42.8% 0.073 276.9)
-
Step 900
900
#3A3E60
oklch(37.6% 0.058 278.1)
-
Step 950
950
#222538
oklch(27.1% 0.036 276.8)
#737BB5 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) | #6981B7 | 0.019 |
| Deuteranopia (no green cones) | #647CB4 | 0.020 |
| Tritanopia (no blue cones) | #608690 | 0.078 |
| Achromatopsia (no color) | #7F7F7F | 0.089 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #737BB5
#737BB5
oklch(60% 0.089 277.3)
- #8F803E
#8F803E
oklch(59.9% 0.088 96.7)
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 #737BB5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Off Blue #5684AE ΔE 0.045
- Dusty Blue #5A86AD ΔE 0.046
- Faded Blue #658CBB ΔE 0.047
- Lavender Gray #7E7F9A ΔE 0.049
- Cool Blue #4984B8 ΔE 0.051
- Steel Blue #4682B4 ΔE 0.054
- Silver Lake Blue #778DA9 ΔE 0.060
- Stormy Blue #507B9C ΔE 0.062
Use #737BB5 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.