#0374F0
Closest named color: Cerulean Blue (#056EEE). oklch(57.9% 0.206 257.2), rgb(3, 116, 240).
Aa
Black text reads best on this color (4.76:1).
About this color
#0374F0 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.206 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.015 away. Black text reads best on it, at 4.76:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.206) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.76:1 |
| White text | 4.41:1 |
Values
| HEX | #0374F0 |
| RGB | rgb(3, 116, 240) |
| HSL | hsl(211, 98%, 48%) |
| OKLCH | oklch(57.9% 0.206 257.2) |
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 #0374F0 | 4.41:1 | AA large text | Lc -75.2 | Fine for body text |
| Black text on #0374F0 | 4.76:1 | AA | Lc 34.4 | Non-text elements, placeholder text |
| #0374F0 text on white | 4.41:1 | AA large text | Lc 69.7 | Content text, not long reading |
| #0374F0 text on black | 4.76:1 | AA | Lc -31.9 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C4DBFC
oklch(88.5% 0.052 257.4)
-
Step 300
300
#9BC3FC
oklch(80.9% 0.092 257.2)
-
Step 400
400
#61A1FB
oklch(70.6% 0.148 257.2)
-
Step 500
500
#3086F9
oklch(63% 0.19 257.3)
-
Step 600
600 (this color)
#0374F0
oklch(57.9% 0.206 257.2)
-
Step 700
700
#005CC1
oklch(49.2% 0.175 257.1)
-
Step 800
800
#004BA0
oklch(42.8% 0.152 257.1)
-
Step 900
900
#0B3F81
oklch(37.7% 0.123 257.2)
-
Step 950
950
#09264C
oklch(27.1% 0.078 256.8)
#0374F0 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) | #1182F4 | 0.037 |
| Deuteranopia (no green cones) | #006FEE | 0.013 |
| Tritanopia (no blue cones) | #0093A7 | 0.155 |
| Achromatopsia (no color) | #787878 | 0.206 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0374F0
#0374F0
oklch(57.9% 0.206 257.2)
- #A16F00
#A16F00
oklch(57.9% 0.121 77.5)
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 #0374F0, closest first.
No curated palette has a color within ΔE 0.04 of #0374F0.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.015
- Clear Blue #247AFD ΔE 0.028
- Bright Blue #0165FC ΔE 0.041
- Royal Blue #4169E1 ΔE 0.041
- Neon Blue #4361EE ΔE 0.050
- Azul #1D5DEC ΔE 0.054
- Dodger Blue #1E90FF ΔE 0.076
- Warm Blue #4B57DB ΔE 0.078
Use #0374F0 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.