#12435B
Closest named color: Dark Grey Blue (#29465B). oklch(36.3% 0.065 234.4), rgb(18, 67, 91).
Aa
White text reads best on this color (10.60:1).
About this color
#12435B is a dark, muted blue. In OKLCH its lightness is 36%, its chroma 0.065 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Grey Blue (#29465B), ΔE 0.025 away. White text reads best on it, at 10.60:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | muted (0.065) |
| Temperature | cool |
| Nearest name | Dark Grey Blue (#29465B) |
| Black text | 1.97:1 |
| White text | 10.60:1 |
Values
| HEX | #12435B |
| RGB | rgb(18, 67, 91) |
| HSL | hsl(200, 67%, 21%) |
| OKLCH | oklch(36.3% 0.065 234.4) |
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 #12435B | 10.60:1 | AAA | Lc -98.3 | Preferred for body text |
| Black text on #12435B | 1.97:1 | Fails | Lc 9.6 | Not readable |
| #12435B text on white | 10.60:1 | AAA | Lc 94.3 | Preferred for body text |
| #12435B text on black | 1.97:1 | Fails | Lc -8.2 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C9DDE9
oklch(88.6% 0.027 234)
-
Step 300
300
#A2C7DC
oklch(81% 0.049 233.1)
-
Step 400
400
#6EA9CB
oklch(70.7% 0.079 234.8)
-
Step 500
500
#4393BD
oklch(63.1% 0.1 234.4)
-
Step 600
600
#1A7DA9
oklch(55.7% 0.109 233.9)
-
Step 700
700
#066991
oklch(49.1% 0.101 234.1)
-
Step 800
800
#0E5676
oklch(42.8% 0.084 234.1)
-
Step 900
900 (this color)
#12435B
oklch(36.3% 0.065 234.4)
-
Step 950
950
#0F2A38
oklch(27.1% 0.042 233.9)
#12435B 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) | #37425C | 0.040 |
| Deuteranopia (no green cones) | #2D3B5B | 0.035 |
| Tritanopia (no blue cones) | #00494B | 0.040 |
| Achromatopsia (no color) | #3F3F3F | 0.066 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12435B
#12435B
oklch(36.3% 0.065 234.4)
- #58341A
#58341A
oklch(36.3% 0.065 54.9)
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 #12435B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Grey Blue #29465B ΔE 0.025
- Charcoal #264653 ΔE 0.026
- Dark Blue Grey #1F3B4D ΔE 0.031
- Midnight Green #073B4C ΔE 0.036
- Prussian Blue #1D3557 ΔE 0.044
- Dark Teal #014D4E ΔE 0.046
- Marine Blue #01386A ΔE 0.050
- Twilight Blue #0A437A ΔE 0.054
Use #12435B 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.