#737FBF
Closest named color: Faded Blue (#658CBB). oklch(61.3% 0.098 275), rgb(115, 127, 191).
Aa
Black text reads best on this color (5.51:1).
About this color
#737FBF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.098 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.040 away. Black text reads best on it, at 5.51:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.51:1 |
| White text | 3.80:1 |
Values
| HEX | #737FBF |
| RGB | rgb(115, 127, 191) |
| HSL | hsl(231, 37%, 60%) |
| OKLCH | oklch(61.3% 0.098 275) |
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 #737FBF | 3.80:1 | AA large text | Lc -71.0 | Content text, not long reading |
| Black text on #737FBF | 5.51:1 | AA | Lc 38.6 | Non-text elements, placeholder text |
| #737FBF text on white | 3.80:1 | AA large text | Lc 65.5 | Content text, not long reading |
| #737FBF text on black | 5.51:1 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D4D8EB
oklch(88.5% 0.026 276.4)
-
Step 300
300
#B7BFE0
oklch(80.9% 0.047 274.6)
-
Step 400
400
#929DD1
oklch(70.6% 0.077 275)
-
Step 500
500 (this color)
#737FBF
oklch(61.3% 0.098 275)
-
Step 600
600
#616DB1
oklch(55.5% 0.106 274.8)
-
Step 700
700
#515B98
oklch(49.1% 0.098 275.1)
-
Step 800
800
#424A7C
oklch(42.6% 0.083 275.4)
-
Step 900
900
#383E63
oklch(37.6% 0.064 275.9)
-
Step 950
950
#21253A
oklch(27.1% 0.04 275.2)
#737FBF 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) | #6A86C2 | 0.020 |
| Deuteranopia (no green cones) | #6480BD | 0.020 |
| Tritanopia (no blue cones) | #5C8C96 | 0.088 |
| Achromatopsia (no color) | #838383 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #737FBF
#737FBF
oklch(61.3% 0.098 275)
- #978338
#978338
oklch(61.3% 0.098 94.4)
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 #737FBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.040
- Off Blue #5684AE ΔE 0.049
- Dusty Blue #5A86AD ΔE 0.049
- Cool Blue #4984B8 ΔE 0.051
- Steel Blue #4682B4 ΔE 0.056
- Lavender Gray #7E7F9A ΔE 0.059
- Silver Lake Blue #778DA9 ΔE 0.059
- Deep Lilac #966EBD ΔE 0.065
Use #737FBF 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.