#437BF6
Closest named color: Clear Blue (#247AFD). oklch(61.2% 0.194 263.4), rgb(67, 123, 246).
Aa
Black text reads best on this color (5.40:1).
About this color
#437BF6 is a medium-dark, vivid blue. In OKLCH its lightness is 61%, its chroma 0.194 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.023 away. Black text reads best on it, at 5.40:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | vivid (0.194) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 5.40:1 |
| White text | 3.88:1 |
Values
| HEX | #437BF6 |
| RGB | rgb(67, 123, 246) |
| HSL | hsl(221, 91%, 61%) |
| OKLCH | oklch(61.2% 0.194 263.4) |
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 #437BF6 | 3.88:1 | AA large text | Lc -71.4 | Content text, not long reading |
| Black text on #437BF6 | 5.40:1 | AA | Lc 38.2 | Non-text elements, placeholder text |
| #437BF6 text on white | 3.88:1 | AA large text | Lc 65.9 | Content text, not long reading |
| #437BF6 text on black | 5.40:1 | AA | Lc -35.8 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C7DAFD
oklch(88.5% 0.053 262.7)
-
Step 300
300
#A1C1FF
oklch(81% 0.095 263.3)
-
Step 400
400
#6E9DFF
oklch(70.6% 0.153 263.6)
-
Step 500
500 (this color)
#437BF6
oklch(61.2% 0.194 263.4)
-
Step 600
600
#2D67EC
oklch(55.7% 0.21 263.4)
-
Step 700
700
#2054CD
oklch(49% 0.196 263.3)
-
Step 800
800
#1C46A6
oklch(42.8% 0.162 263.3)
-
Step 900
900
#1C3C83
oklch(37.7% 0.126 263.3)
-
Step 950
950
#11244D
oklch(27.1% 0.08 263.3)
#437BF6 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) | #2F8AFA | 0.037 |
| Deuteranopia (no green cones) | #0079F4 | 0.033 |
| Tritanopia (no blue cones) | #0098AD | 0.153 |
| Achromatopsia (no color) | #818181 | 0.194 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #437BF6
#437BF6
oklch(61.2% 0.194 263.4)
- #A87B00
#A87B00
oklch(61.1% 0.126 82.8)
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 #437BF6, closest first.
No curated palette has a color within ΔE 0.04 of #437BF6.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.023
- Cornflower #6A79F7 ΔE 0.041
- Cerulean Blue #056EEE ΔE 0.052
- Dodger Blue #1E90FF ΔE 0.053
- Royal Blue #4169E1 ΔE 0.053
- Soft Blue #6488EA ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.060
- Neon Blue #4361EE ΔE 0.063
Use #437BF6 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.