#4389CC
Closest named color: Water Blue (#0E87CC). oklch(61.5% 0.124 249.6), rgb(67, 137, 204).
Aa
Black text reads best on this color (5.68:1).
About this color
#4389CC is a medium-dark, moderately saturated blue. In OKLCH its lightness is 62%, its chroma 0.124 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.028 away. Black text reads best on it, at 5.68:1.
| Hue family | Blues |
| Lightness | medium-dark (62%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.68:1 |
| White text | 3.69:1 |
Values
| HEX | #4389CC |
| RGB | rgb(67, 137, 204) |
| HSL | hsl(209, 57%, 53%) |
| OKLCH | oklch(61.5% 0.124 249.6) |
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 #4389CC | 3.69:1 | AA large text | Lc -69.7 | Content text, not long reading |
| Black text on #4389CC | 5.68:1 | AA | Lc 39.8 | Non-text elements, placeholder text |
| #4389CC text on white | 3.69:1 | AA large text | Lc 64.2 | Content text, not long reading |
| #4389CC text on black | 5.68:1 | AA | Lc -37.4 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF5
oklch(93.5% 0.017 248)
-
Step 200
200
#C9DBEF
oklch(88.4% 0.034 251)
-
Step 300
300
#A3C4E7
oklch(80.8% 0.061 250.1)
-
Step 400
400
#70A5DB
oklch(70.6% 0.098 249.8)
-
Step 500
500 (this color)
#4389CC
oklch(61.5% 0.124 249.6)
-
Step 600
600
#2677BE
oklch(55.7% 0.134 249.4)
-
Step 700
700
#1763A4
oklch(49% 0.126 249.8)
-
Step 800
800
#175185
oklch(42.6% 0.104 249.9)
-
Step 900
900
#1B446B
oklch(37.8% 0.081 249.9)
-
Step 950
950
#11283E
oklch(27% 0.05 249.3)
#4389CC 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) | #6B8CCF | 0.043 |
| Deuteranopia (no green cones) | #587FCB | 0.031 |
| Tritanopia (no blue cones) | #0099A1 | 0.096 |
| Achromatopsia (no color) | #858585 | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4389CC
#4389CC
oklch(61.5% 0.124 249.6)
- #B4751C
#B4751C
oklch(61.5% 0.124 69.3)
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 #4389CC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.028
- Cool Blue #4984B8 ΔE 0.031
- Dark Sky Blue #448EE4 ΔE 0.037
- Steel Blue #4682B4 ΔE 0.038
- Faded Blue #658CBB ΔE 0.044
- Off Blue #5684AE ΔE 0.046
- Dusty Blue #5A86AD ΔE 0.049
- Windows Blue #3778BF ΔE 0.051
Use #4389CC 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.