#34437E
Closest named color: Cobalt (#1E488F). oklch(40.2% 0.101 270.6), rgb(52, 67, 126).
Aa
White text reads best on this color (9.33:1).
About this color
#34437E is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.101 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.035 away. White text reads best on it, at 9.33:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.101) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.25:1 |
| White text | 9.33:1 |
Values
| HEX | #34437E |
| RGB | rgb(52, 67, 126) |
| HSL | hsl(228, 42%, 35%) |
| OKLCH | oklch(40.2% 0.101 270.6) |
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 #34437E | 9.33:1 | AAA | Lc -95.7 | Preferred for body text |
| Black text on #34437E | 2.25:1 | Fails | Lc 12.6 | Not readable |
| #34437E text on white | 9.33:1 | AAA | Lc 91.4 | Preferred for body text |
| #34437E text on black | 2.25:1 | Fails | Lc -11.0 | Not readable |
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 900.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CED8F6
oklch(88.4% 0.043 270.9)
-
Step 300
300
#AEBFF2
oklch(80.9% 0.075 270.3)
-
Step 400
400
#849CEC
oklch(70.7% 0.121 270.4)
-
Step 500
500
#6781E6
oklch(63.1% 0.154 270.6)
-
Step 600
600
#5068D4
oklch(55.6% 0.168 270.6)
-
Step 700
700
#4156B8
oklch(49.2% 0.156 270.5)
-
Step 800
800
#354795
oklch(42.8% 0.129 270.3)
-
Step 900
900 (this color)
#34437E
oklch(40.2% 0.101 270.6)
-
Step 950
950
#1B2445
oklch(27.1% 0.063 270.3)
#34437E 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) | #284A80 | 0.022 |
| Deuteranopia (no green cones) | #1F447D | 0.024 |
| Tritanopia (no blue cones) | #05505A | 0.090 |
| Achromatopsia (no color) | #474747 | 0.101 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #34437E
#34437E
oklch(40.2% 0.101 270.6)
- #594600
#594600
oklch(40.3% 0.082 91)
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 #34437E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.035
- Twilight Blue #0A437A ΔE 0.039
- Dark Slate Blue #483D8B ΔE 0.041
- Light Navy #155084 ΔE 0.043
- Dusk Blue #26538D ΔE 0.048
- Blueberry #464196 ΔE 0.049
- Deep Sea Blue #015482 ΔE 0.056
- Twilight #4E518B ΔE 0.061
Use #34437E 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.