#37435A
Closest named color: Dark Grey Blue (#29465B). oklch(38.2% 0.043 263.1), rgb(55, 67, 90).
Aa
White text reads best on this color (9.93:1).
About this color
#37435A is a dark, muted blue. In OKLCH its lightness is 38%, its chroma 0.043 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.019 away. White text reads best on it, at 9.93:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | muted (0.043) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 2.11:1 |
| White text | 9.93:1 |
Values
| HEX | #37435A |
| RGB | rgb(55, 67, 90) |
| HSL | hsl(219, 24%, 28%) |
| OKLCH | oklch(38.2% 0.043 263.1) |
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 #37435A | 9.93:1 | AAA | Lc -97.2 | Preferred for body text |
| Black text on #37435A | 2.11:1 | Fails | Lc 10.9 | Not readable |
| #37435A text on white | 9.93:1 | AAA | Lc 93.0 | Preferred for body text |
| #37435A text on black | 2.11:1 | Fails | Lc -9.4 | 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
#F4F5F8
oklch(97% 0.004 271.4)
-
Step 100
100
#E7EAF0
oklch(93.6% 0.009 264.5)
-
Step 200
200
#D3D9E5
oklch(88.4% 0.018 264.5)
-
Step 300
300
#B6C1D6
oklch(80.9% 0.032 263.5)
-
Step 400
400
#90A1C1
oklch(70.7% 0.051 263)
-
Step 500
500
#758AB2
oklch(63.2% 0.065 263.1)
-
Step 600
600
#5D739D
oklch(55.5% 0.071 262.9)
-
Step 700
700
#4D6187
oklch(49.2% 0.066 262.8)
-
Step 800
800
#3F4F6D
oklch(42.7% 0.054 262.6)
-
Step 900
900 (this color)
#37435A
oklch(38.2% 0.043 263.1)
-
Step 950
950
#1F2634
oklch(26.8% 0.028 263.9)
#37435A 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) | #3B445B | 0.007 |
| Deuteranopia (no green cones) | #384159 | 0.006 |
| Tritanopia (no blue cones) | #2C484B | 0.038 |
| Achromatopsia (no color) | #434343 | 0.043 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37435A
#37435A
oklch(38.2% 0.043 263.1)
- #4E4128
#4E4128
oklch(38.2% 0.043 83.1)
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 #37435A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.019
- Charcoal #264653 ΔE 0.028
- Charcoal Grey #3C4142 ΔE 0.040
- Onyx #343A40 ΔE 0.048
- Dark Blue Grey #1F3B4D ΔE 0.048
- Dark Slate Gray #2F4F4F ΔE 0.049
- Prussian Blue #1D3557 ΔE 0.060
- Dark Teal #014D4E ΔE 0.062
Use #37435A 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.