#5973B2
Closest named color: Flat Blue (#3C73A8). oklch(56.3% 0.103 266.2), rgb(89, 115, 178).
Aa
White text reads best on this color (4.64:1).
About this color
#5973B2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.103 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.036 away. White text reads best on it, at 4.64:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.51:1 |
| White text | 4.64:1 |
Values
| HEX | #5973B2 |
| RGB | rgb(89, 115, 178) |
| HSL | hsl(222, 37%, 52%) |
| OKLCH | oklch(56.3% 0.103 266.2) |
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 #5973B2 | 4.64:1 | AA | Lc -77.6 | Fine for body text |
| Black text on #5973B2 | 4.51:1 | AA | Lc 31.9 | Non-text elements, placeholder text |
| #5973B2 text on white | 4.64:1 | AA | Lc 72.2 | Content text, not long reading |
| #5973B2 text on black | 4.51:1 | AA | Lc -29.5 | 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
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E6EAF3
oklch(93.7% 0.013 266.7)
-
Step 200
200
#D1D9EB
oklch(88.5% 0.026 266.6)
-
Step 300
300
#B3C1DF
oklch(81% 0.045 265.5)
-
Step 400
400
#8BA0D0
oklch(70.7% 0.075 266.2)
-
Step 500
500
#6F88C3
oklch(63.2% 0.094 266.2)
-
Step 600
600 (this color)
#5973B2
oklch(56.3% 0.103 266.2)
-
Step 700
700
#475E97
oklch(49% 0.096 266.3)
-
Step 800
800
#3B4D7A
oklch(42.7% 0.078 266.6)
-
Step 900
900
#324063
oklch(37.6% 0.063 266.8)
-
Step 950
950
#1D263A
oklch(27% 0.04 265.3)
#5973B2 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) | #5B79B5 | 0.017 |
| Deuteranopia (no green cones) | #5171B1 | 0.012 |
| Tritanopia (no blue cones) | #33808A | 0.091 |
| Achromatopsia (no color) | #747474 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5973B2
#5973B2
oklch(56.3% 0.103 266.2)
- #907020
#907020
oklch(56.2% 0.102 85.8)
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 #5973B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.036
- French Blue #436BAD ΔE 0.037
- Windows Blue #3778BF ΔE 0.037
- Dull Blue #49759C ΔE 0.042
- Steel Blue #4682B4 ΔE 0.044
- Muted Blue #3B719F ΔE 0.047
- Cool Blue #4984B8 ΔE 0.047
- Stormy Blue #507B9C ΔE 0.048
Use #5973B2 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.