#737FBC
Closest named color: Faded Blue (#658CBB). oklch(61.2% 0.094 274.8), rgb(115, 127, 188).
Aa
Black text reads best on this color (5.49:1).
About this color
#737FBC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.094 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.039 away. Black text reads best on it, at 5.49:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 5.49:1 |
| White text | 3.82:1 |
Values
| HEX | #737FBC |
| RGB | rgb(115, 127, 188) |
| HSL | hsl(230, 35%, 59%) |
| OKLCH | oklch(61.2% 0.094 274.8) |
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 #737FBC | 3.82:1 | AA large text | Lc -71.2 | Content text, not long reading |
| Black text on #737FBC | 5.49:1 | AA | Lc 38.4 | Non-text elements, placeholder text |
| #737FBC text on white | 3.82:1 | AA large text | Lc 65.7 | Content text, not long reading |
| #737FBC text on black | 5.49:1 | AA | Lc -36.0 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7E9F3
oklch(93.5% 0.014 277.1)
-
Step 200
200
#D4D8EA
oklch(88.5% 0.025 275.9)
-
Step 300
300
#B7BFDF
oklch(80.9% 0.046 274.3)
-
Step 400
400
#939DCF
oklch(70.6% 0.074 275.6)
-
Step 500
500 (this color)
#737FBC
oklch(61.2% 0.094 274.8)
-
Step 600
600
#626EAF
oklch(55.7% 0.102 274.7)
-
Step 700
700
#515B96
oklch(49% 0.095 275)
-
Step 800
800
#424B7A
oklch(42.7% 0.079 274.4)
-
Step 900
900
#383F62
oklch(37.8% 0.061 274.5)
-
Step 950
950
#212539
oklch(27% 0.038 274.9)
#737FBC 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) | #6B85BF | 0.018 |
| Deuteranopia (no green cones) | #6580BB | 0.018 |
| Tritanopia (no blue cones) | #5D8B95 | 0.083 |
| Achromatopsia (no color) | #828282 | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #737FBC
#737FBC
oklch(61.2% 0.094 274.8)
- #95833C
#95833C
oklch(61.1% 0.094 95.2)
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 #737FBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.039
- Off Blue #5684AE ΔE 0.046
- Dusty Blue #5A86AD ΔE 0.046
- Cool Blue #4984B8 ΔE 0.050
- Lavender Gray #7E7F9A ΔE 0.054
- Steel Blue #4682B4 ΔE 0.054
- Silver Lake Blue #778DA9 ΔE 0.056
- Blue Grey #758DA3 ΔE 0.063
Use #737FBC 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.