#0373FF
Closest named color: Clear Blue (#247AFD). oklch(58.9% 0.226 258.9), rgb(3, 115, 255).
Aa
Black text reads best on this color (4.90:1).
About this color
#0373FF is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.226 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Clear Blue (#247AFD), ΔE 0.022 away. Black text reads best on it, at 4.90:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.226) |
| Temperature | cool |
| Nearest name | Clear Blue (#247AFD) |
| Black text | 4.90:1 |
| White text | 4.28:1 |
Values
| HEX | #0373FF |
| RGB | rgb(3, 115, 255) |
| HSL | hsl(213, 100%, 51%) |
| OKLCH | oklch(58.9% 0.226 258.9) |
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 #0373FF | 4.28:1 | AA large text | Lc -74.2 | Content text, not long reading |
| Black text on #0373FF | 4.90:1 | AA | Lc 35.4 | Non-text elements, placeholder text |
| #0373FF text on white | 4.28:1 | AA large text | Lc 68.7 | Content text, not long reading |
| #0373FF text on black | 4.90:1 | AA | Lc -33.0 | 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 600.
-
Step 50
50
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFE
oklch(93.6% 0.029 257.8)
-
Step 200
200
#C3DBFF
oklch(88.5% 0.056 258.4)
-
Step 300
300
#9BC2FF
oklch(80.8% 0.097 259.2)
-
Step 400
400
#63A0FF
oklch(70.7% 0.154 259)
-
Step 500
500
#3284FF
oklch(63.1% 0.199 258.9)
-
Step 600
600 (this color)
#0373FF
oklch(58.9% 0.226 258.9)
-
Step 700
700
#0059C9
oklch(49.2% 0.189 258.8)
-
Step 800
800
#0048A7
oklch(42.7% 0.165 259)
-
Step 900
900
#083D87
oklch(37.7% 0.135 258.8)
-
Step 950
950
#08244F
oklch(26.8% 0.086 259.1)
#0373FF 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) | #0085FF | 0.045 |
| Deuteranopia (no green cones) | #0070FC | 0.009 |
| Tritanopia (no blue cones) | #0096AE | 0.169 |
| Achromatopsia (no color) | #7A7A7A | 0.226 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0373FF
#0373FF
oklch(58.9% 0.226 258.9)
- #A37300
#A37300
oklch(58.9% 0.122 79.5)
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 #0373FF, closest first.
No curated palette has a color within ΔE 0.04 of #0373FF.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Clear Blue #247AFD ΔE 0.022
- Cerulean Blue #056EEE ΔE 0.028
- Bright Blue #0165FC ΔE 0.033
- Neon Blue #4361EE ΔE 0.052
- Royal Blue #4169E1 ΔE 0.054
- Azul #1D5DEC ΔE 0.057
- Electric Blue #0652FF ΔE 0.073
- Dodger Blue #1E90FF ΔE 0.075
Use #0373FF 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.