#437AA2
Closest named color: Cerulean (#457B9D). oklch(55.9% 0.085 242), rgb(67, 122, 162).
Aa
White text reads best on this color (4.62:1).
About this color
#437AA2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 56%, its chroma 0.085 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Cerulean (#457B9D), ΔE 0.009 away. White text reads best on it, at 4.62:1.
| Hue family | Blues |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.085) |
| Temperature | cool |
| Nearest name | Cerulean (#457B9D) |
| Black text | 4.54:1 |
| White text | 4.62:1 |
Values
| HEX | #437AA2 |
| RGB | rgb(67, 122, 162) |
| HSL | hsl(205, 41%, 45%) |
| OKLCH | oklch(55.9% 0.085 242) |
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 #437AA2 | 4.62:1 | AA | Lc -77.4 | Fine for body text |
| Black text on #437AA2 | 4.54:1 | AA | Lc 32.1 | Non-text elements, placeholder text |
| #437AA2 text on white | 4.62:1 | AA | Lc 71.9 | Content text, not long reading |
| #437AA2 text on black | 4.54:1 | AA | Lc -29.7 | 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
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CDDBE6
oklch(88.4% 0.021 241.4)
-
Step 300
300
#ACC4D8
oklch(80.9% 0.039 243.3)
-
Step 400
400
#7FA6C4
oklch(70.7% 0.061 241.8)
-
Step 500
500
#5D8FB5
oklch(63% 0.079 242.3)
-
Step 600
600 (this color)
#437AA2
oklch(55.9% 0.085 242)
-
Step 700
700
#34668A
oklch(49.2% 0.079 242.1)
-
Step 800
800
#2B5370
oklch(42.6% 0.066 242)
-
Step 900
900
#28455B
oklch(37.8% 0.052 242.6)
-
Step 950
950
#182835
oklch(26.9% 0.033 243.9)
#437AA2 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) | #687AA4 | 0.043 |
| Deuteranopia (no green cones) | #5B71A1 | 0.034 |
| Tritanopia (no blue cones) | #008488 | 0.067 |
| Achromatopsia (no color) | #757575 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #437AA2
#437AA2
oklch(55.9% 0.085 242)
- #98683D
#98683D
oklch(55.8% 0.085 61.5)
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 #437AA2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cerulean #457B9D ΔE 0.009
- Dull Blue #49759C ΔE 0.015
- Stormy Blue #507B9C ΔE 0.017
- Flat Blue #3C73A8 ΔE 0.026
- Muted Blue #3B719F ΔE 0.028
- Steel Blue #4682B4 ΔE 0.033
- Metallic Blue #4F738E ΔE 0.033
- Nice Blue #107AB0 ΔE 0.036
Use #437AA2 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.