#437499
Closest named color: Dull Blue (#49759C). oklch(54% 0.079 242.7), rgb(67, 116, 153).
Aa
White text reads best on this color (5.00:1).
About this color
#437499 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.079 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Dull Blue (#49759C), ΔE 0.009 away. White text reads best on it, at 5.00:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.079) |
| Temperature | cool |
| Nearest name | Dull Blue (#49759C) |
| Black text | 4.19:1 |
| White text | 5.00:1 |
Values
| HEX | #437499 |
| RGB | rgb(67, 116, 153) |
| HSL | hsl(206, 39%, 43%) |
| OKLCH | oklch(54% 0.079 242.7) |
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 #437499 | 5.00:1 | AA | Lc -79.9 | Fine for body text |
| Black text on #437499 | 4.19:1 | AA large text | Lc 29.6 | Dividers and decoration only |
| #437499 text on white | 5.00:1 | AA | Lc 74.5 | Content text, not long reading |
| #437499 text on black | 4.19:1 | AA large text | Lc -27.2 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E4EBF0
oklch(93.6% 0.01 238.5)
-
Step 200
200
#CEDBE5
oklch(88.5% 0.02 240.8)
-
Step 300
300
#AEC4D6
oklch(80.9% 0.035 242.8)
-
Step 400
400
#82A5C2
oklch(70.6% 0.057 243.7)
-
Step 500
500
#628FB2
oklch(63.1% 0.072 242.7)
-
Step 600
600 (this color)
#437499
oklch(54% 0.079 242.7)
-
Step 700
700
#396587
oklch(49% 0.073 243.4)
-
Step 800
800
#2F536E
oklch(42.7% 0.061 242.5)
-
Step 900
900
#2A4559
oklch(37.8% 0.048 241.7)
-
Step 950
950
#192834
oklch(26.9% 0.03 243.3)
#437499 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) | #64749B | 0.040 |
| Deuteranopia (no green cones) | #586B98 | 0.033 |
| Tritanopia (no blue cones) | #007D81 | 0.065 |
| Achromatopsia (no color) | #6F6F6F | 0.079 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #437499
#437499
oklch(54% 0.079 242.7)
- #8F643C
#8F643C
oklch(53.9% 0.079 62.8)
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 #437499, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dull Blue #49759C ΔE 0.009
- Muted Blue #3B719F ΔE 0.017
- Metallic Blue #4F738E ΔE 0.020
- Cerulean #457B9D ΔE 0.021
- Flat Blue #3C73A8 ΔE 0.025
- Stormy Blue #507B9C ΔE 0.026
- Sea Blue #047495 ΔE 0.037
- Ocean Blue #03719C ΔE 0.039
Use #437499 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.