#426FA5
Closest named color: Flat Blue (#3C73A8). oklch(53.4% 0.099 253.9), rgb(66, 111, 165).
Aa
White text reads best on this color (5.18:1).
About this color
#426FA5 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.099 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.012 away. White text reads best on it, at 5.18:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.04:1 |
| White text | 5.18:1 |
Values
| HEX | #426FA5 |
| RGB | rgb(66, 111, 165) |
| HSL | hsl(213, 43%, 45%) |
| OKLCH | oklch(53.4% 0.099 253.9) |
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 #426FA5 | 5.18:1 | AA | Lc -80.9 | Fine for body text |
| Black text on #426FA5 | 4.04:1 | AA large text | Lc 28.5 | Dividers and decoration only |
| #426FA5 text on white | 5.18:1 | AA | Lc 75.5 | Fine for body text |
| #426FA5 text on black | 4.04:1 | AA large text | Lc -26.2 | Dividers and decoration only |
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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CEDAEA
oklch(88.4% 0.026 255.6)
-
Step 300
300
#ADC3DD
oklch(80.9% 0.044 252.7)
-
Step 400
400
#82A3CD
oklch(70.6% 0.072 254.7)
-
Step 500
500
#628CC0
oklch(63.1% 0.092 254.3)
-
Step 600
600 (this color)
#426FA5
oklch(53.4% 0.099 253.9)
-
Step 700
700
#396394
oklch(49.2% 0.092 253.4)
-
Step 800
800
#305178
oklch(42.8% 0.076 253.6)
-
Step 900
900
#2B4361
oklch(37.8% 0.06 254.6)
-
Step 950
950
#192739
oklch(26.9% 0.039 255.1)
#426FA5 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) | #5872A7 | 0.028 |
| Deuteranopia (no green cones) | #4B69A4 | 0.018 |
| Tritanopia (no blue cones) | #007B82 | 0.084 |
| Achromatopsia (no color) | #6D6D6D | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #426FA5
#426FA5
oklch(53.4% 0.099 253.9)
- #8F6320
#8F6320
oklch(53.4% 0.099 73.5)
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 #426FA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.012
- Muted Blue #3B719F ΔE 0.014
- French Blue #436BAD ΔE 0.019
- Dull Blue #49759C ΔE 0.027
- Mid Blue #276AB3 ΔE 0.037
- Nice Blue #107AB0 ΔE 0.039
- Ocean Blue #03719C ΔE 0.040
- Cerulean #457B9D ΔE 0.041
Use #426FA5 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.