#4089C2
Closest named color: Cool Blue (#4984B8). oklch(60.9% 0.113 244.9), rgb(64, 137, 194).
Aa
Black text reads best on this color (5.57:1).
About this color
#4089C2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.113 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.018 away. Black text reads best on it, at 5.57:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.57:1 |
| White text | 3.76:1 |
Values
| HEX | #4089C2 |
| RGB | rgb(64, 137, 194) |
| HSL | hsl(206, 52%, 51%) |
| OKLCH | oklch(60.9% 0.113 244.9) |
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 #4089C2 | 3.76:1 | AA large text | Lc -70.5 | Content text, not long reading |
| Black text on #4089C2 | 5.57:1 | AA | Lc 39.1 | Non-text elements, placeholder text |
| #4089C2 text on white | 3.76:1 | AA large text | Lc 65.0 | Content text, not long reading |
| #4089C2 text on black | 5.57:1 | AA | Lc -36.7 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A3C5E3
oklch(80.9% 0.056 245.2)
-
Step 400
400
#70A7D4
oklch(70.8% 0.088 244.2)
-
Step 500
500 (this color)
#4089C2
oklch(60.9% 0.113 244.9)
-
Step 600
600
#2379B6
oklch(55.6% 0.123 244.7)
-
Step 700
700
#14669D
oklch(49.2% 0.114 244.6)
-
Step 800
800
#15537F
oklch(42.7% 0.095 244.8)
-
Step 900
900
#1A4566
oklch(37.7% 0.074 244.9)
-
Step 950
950
#11293C
oklch(27.2% 0.047 244.6)
#4089C2 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) | #708AC5 | 0.051 |
| Deuteranopia (no green cones) | #5E7EC1 | 0.039 |
| Tritanopia (no blue cones) | #00979D | 0.084 |
| Achromatopsia (no color) | #838383 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4089C2
#4089C2
oklch(60.9% 0.113 244.9)
- #B1732F
#B1732F
oklch(60.9% 0.113 64.9)
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 #4089C2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.018
- Steel Blue #4682B4 ΔE 0.025
- Water Blue #0E87CC ΔE 0.030
- Off Blue #5684AE ΔE 0.034
- Dusty Blue #5A86AD ΔE 0.037
- Blue NCS #118AB2 ΔE 0.037
- Faded Blue #658CBB ΔE 0.039
- Windows Blue #3778BF ΔE 0.050
Use #4089C2 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.