#737BB0
Closest named color: Lavender Gray (#7E7F9A). oklch(59.8% 0.081 277), rgb(115, 123, 176).
Aa
Black text reads best on this color (5.18:1).
About this color
#737BB0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.081 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Lavender Gray (#7E7F9A), ΔE 0.042 away. Black text reads best on it, at 5.18:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Lavender Gray (#7E7F9A) |
| Black text | 5.18:1 |
| White text | 4.04:1 |
Values
| HEX | #737BB0 |
| RGB | rgb(115, 123, 176) |
| HSL | hsl(232, 28%, 57%) |
| OKLCH | oklch(59.8% 0.081 277) |
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 #737BB0 | 4.04:1 | AA large text | Lc -73.2 | Content text, not long reading |
| Black text on #737BB0 | 5.18:1 | AA | Lc 36.4 | Non-text elements, placeholder text |
| #737BB0 text on white | 4.04:1 | AA large text | Lc 67.7 | Content text, not long reading |
| #737BB0 text on black | 5.18:1 | AA | Lc -34.0 | 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
#E8E9F2
oklch(93.6% 0.012 281.1)
-
Step 200
200
#D5D8E8
oklch(88.5% 0.022 277.5)
-
Step 300
300
#BABFDB
oklch(81% 0.04 277.5)
-
Step 400
400
#969DC9
oklch(70.6% 0.065 277.6)
-
Step 500
500 (this color)
#737BB0
oklch(59.8% 0.081 277)
-
Step 600
600
#666EA7
oklch(55.6% 0.089 277)
-
Step 700
700
#555C8F
oklch(49.1% 0.082 277)
-
Step 800
800
#464B74
oklch(42.7% 0.068 277.8)
-
Step 900
900
#3A3F5E
oklch(37.7% 0.053 276.5)
-
Step 950
950
#222537
oklch(27% 0.034 276.6)
#737BB0 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) | #6B81B2 | 0.018 |
| Deuteranopia (no green cones) | #677CAF | 0.016 |
| Tritanopia (no blue cones) | #62858E | 0.072 |
| Achromatopsia (no color) | #7E7E7E | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #737BB0
#737BB0
oklch(59.8% 0.081 277)
- #8D8044
#8D8044
oklch(59.8% 0.082 97.4)
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 #737BB0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Lavender Gray #7E7F9A ΔE 0.042
- Off Blue #5684AE ΔE 0.042
- Dusty Blue #5A86AD ΔE 0.043
- Faded Blue #658CBB ΔE 0.047
- Cool Blue #4984B8 ΔE 0.051
- Steel Blue #4682B4 ΔE 0.053
- Silver Lake Blue #778DA9 ΔE 0.056
- Slate Gray #708090 ΔE 0.056
Use #737BB0 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.