#2377E6
Closest named color: Cerulean Blue (#056EEE). oklch(58.2% 0.186 257.5), rgb(35, 119, 230).
Aa
Black text reads best on this color (4.85:1).
About this color
#2377E6 is a medium-dark, vivid blue. In OKLCH its lightness is 58%, its chroma 0.186 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean Blue (#056EEE), ΔE 0.030 away. Black text reads best on it, at 4.85:1.
| Hue family | Blues |
| Lightness | medium-dark (58%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Cerulean Blue (#056EEE) |
| Black text | 4.85:1 |
| White text | 4.32:1 |
Values
| HEX | #2377E6 |
| RGB | rgb(35, 119, 230) |
| HSL | hsl(214, 80%, 52%) |
| OKLCH | oklch(58.2% 0.186 257.5) |
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 #2377E6 | 4.32:1 | AA large text | Lc -74.9 | Content text, not long reading |
| Black text on #2377E6 | 4.85:1 | AA | Lc 34.7 | Non-text elements, placeholder text |
| #2377E6 text on white | 4.32:1 | AA large text | Lc 69.4 | Content text, not long reading |
| #2377E6 text on black | 4.85:1 | AA | Lc -32.3 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF8
oklch(88.5% 0.046 256.5)
-
Step 300
300
#9FC3F7
oklch(81% 0.084 257.5)
-
Step 400
400
#69A2F3
oklch(70.8% 0.134 257.3)
-
Step 500
500
#3E88EE
oklch(63.1% 0.17 257.2)
-
Step 600
600 (this color)
#2377E6
oklch(58.2% 0.186 257.5)
-
Step 700
700
#075CC0
oklch(49.2% 0.173 257.4)
-
Step 800
800
#0D4C9B
oklch(42.8% 0.142 257.3)
-
Step 900
900
#15407B
oklch(37.7% 0.111 257.5)
-
Step 950
950
#0E2648
oklch(27% 0.07 257.6)
#2377E6 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) | #3483EA | 0.035 |
| Deuteranopia (no green cones) | #0071E4 | 0.021 |
| Tritanopia (no blue cones) | #0092A3 | 0.142 |
| Achromatopsia (no color) | #797979 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2377E6
#2377E6
oklch(58.2% 0.186 257.5)
- #A27000
#A27000
oklch(58.2% 0.121 77.7)
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 #2377E6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean Blue #056EEE ΔE 0.030
- Clear Blue #247AFD ΔE 0.035
- Royal Blue #4169E1 ΔE 0.037
- Neon Blue #4361EE ΔE 0.056
- Bright Blue #0165FC ΔE 0.059
- Windows Blue #3778BF ΔE 0.061
- Water Blue #0E87CC ΔE 0.063
- Azul #1D5DEC ΔE 0.065
Use #2377E6 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.