#737CDB
Closest named color: Soft Blue (#6488EA). oklch(62.3% 0.142 277.3), rgb(115, 124, 219).
Aa
Black text reads best on this color (5.63:1).
About this color
#737CDB is a medium-light, vivid blue. In OKLCH its lightness is 62%, its chroma 0.142 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Soft Blue (#6488EA), ΔE 0.037 away. Black text reads best on it, at 5.63:1.
| Hue family | Blues |
| Lightness | medium-light (62%) |
| Chroma | vivid (0.142) |
| Temperature | cool |
| Nearest name | Soft Blue (#6488EA) |
| Black text | 5.63:1 |
| White text | 3.72:1 |
Values
| HEX | #737CDB |
| RGB | rgb(115, 124, 219) |
| HSL | hsl(235, 59%, 65%) |
| OKLCH | oklch(62.3% 0.142 277.3) |
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 #737CDB | 3.72:1 | AA large text | Lc -70.2 | Content text, not long reading |
| Black text on #737CDB | 5.63:1 | AA | Lc 39.4 | Non-text elements, placeholder text |
| #737CDB text on white | 3.72:1 | AA large text | Lc 64.7 | Content text, not long reading |
| #737CDB text on black | 5.63:1 | AA | Lc -37.0 | 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
#F4F5FC
oklch(97.1% 0.009 279.7)
-
Step 100
100
#E6E9F8
oklch(93.6% 0.02 276.9)
-
Step 200
200
#D2D7F3
oklch(88.4% 0.039 277.6)
-
Step 300
300
#B5BDEE
oklch(80.9% 0.07 277.5)
-
Step 400
400
#8F9AE5
oklch(70.7% 0.11 276.8)
-
Step 500
500 (this color)
#737CDB
oklch(62.3% 0.142 277.3)
-
Step 600
600
#5F66CC
oklch(55.6% 0.155 277.1)
-
Step 700
700
#4F54B0
oklch(49.1% 0.144 277.4)
-
Step 800
800
#41458F
oklch(42.7% 0.12 277.7)
-
Step 900
900
#363B72
oklch(37.7% 0.093 277)
-
Step 950
950
#202343
oklch(27.1% 0.059 277.6)
#737CDB 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) | #5689DF | 0.044 |
| Deuteranopia (no green cones) | #4D80D9 | 0.045 |
| Tritanopia (no blue cones) | #4C90A1 | 0.125 |
| Achromatopsia (no color) | #848484 | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #737CDB
#737CDB
oklch(62.3% 0.142 277.3)
- #9D8600
#9D8600
oklch(62.2% 0.128 97)
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 #737CDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Soft Blue #6488EA ΔE 0.037
- Cornflower #6A79F7 ΔE 0.045
- Medium Purple #9370DB ΔE 0.053
- Medium Slate Blue #7B68EE ΔE 0.060
- Perrywinkle #8F8CE7 ΔE 0.061
- Lavender Blue #8B88F8 ΔE 0.062
- Dark Sky Blue #448EE4 ΔE 0.062
- Cornflower Blue #6495ED ΔE 0.065
Use #737CDB 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.