#437191
Closest named color: Metallic Blue (#4F738E). oklch(52.9% 0.072 240.3), rgb(67, 113, 145).
Aa
White text reads best on this color (5.23:1).
About this color
#437191 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.072 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Metallic Blue (#4F738E), ΔE 0.016 away. White text reads best on it, at 5.23:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Metallic Blue (#4F738E) |
| Black text | 4.00:1 |
| White text | 5.23:1 |
Values
| HEX | #437191 |
| RGB | rgb(67, 113, 145) |
| HSL | hsl(205, 37%, 42%) |
| OKLCH | oklch(52.9% 0.072 240.3) |
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 #437191 | 5.23:1 | AA | Lc -81.2 | Fine for body text |
| Black text on #437191 | 4.00:1 | AA large text | Lc 28.2 | Dividers and decoration only |
| #437191 text on white | 5.23:1 | AA | Lc 75.9 | Fine for body text |
| #437191 text on black | 4.00:1 | AA large text | Lc -25.9 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EBF0
oklch(93.7% 0.009 242.8)
-
Step 200
200
#CFDBE4
oklch(88.5% 0.018 240)
-
Step 300
300
#AFC4D4
oklch(81% 0.032 240.7)
-
Step 400
400
#84A5BE
oklch(70.6% 0.052 241.1)
-
Step 500
500
#648FAE
oklch(63.1% 0.066 240.5)
-
Step 600
600 (this color)
#437191
oklch(52.9% 0.072 240.3)
-
Step 700
700
#3C6683
oklch(49.2% 0.066 240.1)
-
Step 800
800
#32536A
oklch(42.7% 0.054 240.2)
-
Step 900
900
#2C4556
oklch(37.8% 0.042 239.1)
-
Step 950
950
#1A2833
oklch(26.9% 0.028 242.7)
#437191 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) | #637193 | 0.039 |
| Deuteranopia (no green cones) | #586990 | 0.032 |
| Tritanopia (no blue cones) | #14797C | 0.058 |
| Achromatopsia (no color) | #6C6C6C | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #437191
#437191
oklch(52.9% 0.072 240.3)
- #8A6240
#8A6240
oklch(53% 0.071 60.7)
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 #437191, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Metallic Blue #4F738E ΔE 0.016
- Dull Blue #49759C ΔE 0.021
- Muted Blue #3B719F ΔE 0.023
- Cerulean #457B9D ΔE 0.032
- Sea Blue #047495 ΔE 0.035
- Flat Blue #3C73A8 ΔE 0.036
- Stormy Blue #507B9C ΔE 0.036
- Ocean Blue #03719C ΔE 0.039
Use #437191 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.