#737FB8
Closest named color: Faded Blue (#658CBB). oklch(61% 0.088 274.4), rgb(115, 127, 184).
Aa
Black text reads best on this color (5.45:1).
About this color
#737FB8 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.088 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.037 away. Black text reads best on it, at 5.45:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.45:1 |
| White text | 3.84:1 |
Values
| HEX | #737FB8 |
| RGB | rgb(115, 127, 184) |
| HSL | hsl(230, 33%, 59%) |
| OKLCH | oklch(61% 0.088 274.4) |
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 #737FB8 | 3.84:1 | AA large text | Lc -71.4 | Content text, not long reading |
| Black text on #737FB8 | 5.45:1 | AA | Lc 38.2 | Non-text elements, placeholder text |
| #737FB8 text on white | 3.84:1 | AA large text | Lc 65.9 | Content text, not long reading |
| #737FB8 text on black | 5.45:1 | AA | Lc -35.7 | 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
#D4D8E9
oklch(88.4% 0.024 275.3)
-
Step 300
300
#B8BFDD
oklch(80.9% 0.043 275)
-
Step 400
400
#939ECC
oklch(70.7% 0.069 274.1)
-
Step 500
500 (this color)
#737FB8
oklch(61% 0.088 274.4)
-
Step 600
600
#626EAB
oklch(55.5% 0.096 274.4)
-
Step 700
700
#525C93
oklch(49.1% 0.089 274.8)
-
Step 800
800
#434B77
oklch(42.6% 0.074 275)
-
Step 900
900
#383F60
oklch(37.7% 0.057 274.2)
-
Step 950
950
#212538
oklch(27% 0.036 274.6)
#737FB8 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) | #6C85BA | 0.017 |
| Deuteranopia (no green cones) | #677FB7 | 0.016 |
| Tritanopia (no blue cones) | #5F8A93 | 0.078 |
| Achromatopsia (no color) | #828282 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #737FB8
#737FB8
oklch(61% 0.088 274.4)
- #948241
#948241
oklch(60.9% 0.088 94.2)
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 #737FB8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.037
- Dusty Blue #5A86AD ΔE 0.042
- Off Blue #5684AE ΔE 0.042
- Lavender Gray #7E7F9A ΔE 0.048
- Cool Blue #4984B8 ΔE 0.049
- Silver Lake Blue #778DA9 ΔE 0.052
- Steel Blue #4682B4 ΔE 0.052
- Blue Grey #758DA3 ΔE 0.058
Use #737FB8 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.