#133C4F
Closest named color: Midnight Green (#073B4C). oklch(33.7% 0.056 232), rgb(19, 60, 79).
Aa
White text reads best on this color (11.75:1).
About this color
#133C4F is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.056 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Green (#073B4C), ΔE 0.010 away. White text reads best on it, at 11.75:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Midnight Green (#073B4C) |
| Black text | 1.78:1 |
| White text | 11.75:1 |
Values
| HEX | #133C4F |
| RGB | rgb(19, 60, 79) |
| HSL | hsl(199, 61%, 19%) |
| OKLCH | oklch(33.7% 0.056 232) |
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 #133C4F | 11.75:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #133C4F | 1.78:1 | Fails | Lc 0.0 | Not readable |
| #133C4F text on white | 11.75:1 | AAA | Lc 96.8 | Preferred for body text |
| #133C4F text on black | 1.78:1 | Fails | Lc 0.0 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CBDCE6
oklch(88.5% 0.023 233.4)
-
Step 300
300
#A6C6D7
oklch(80.9% 0.042 231.1)
-
Step 400
400
#75A8C3
oklch(70.6% 0.067 232)
-
Step 500
500
#4F93B4
oklch(63.2% 0.085 231.3)
-
Step 600
600
#2F7CA0
oklch(55.5% 0.093 232.3)
-
Step 700
700
#206989
oklch(49.1% 0.086 231.5)
-
Step 800
800
#1D566F
oklch(42.8% 0.071 230.8)
-
Step 900
900 (this color)
#133C4F
oklch(33.7% 0.056 232)
-
Step 950
950
#132935
oklch(26.9% 0.036 234.1)
#133C4F 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) | #333B50 | 0.038 |
| Deuteranopia (no green cones) | #2A354F | 0.032 |
| Tritanopia (no blue cones) | #004142 | 0.035 |
| Achromatopsia (no color) | #383838 | 0.056 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133C4F
#133C4F
oklch(33.7% 0.056 232)
- #4E2E1B
#4E2E1B
oklch(33.6% 0.056 50.6)
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 #133C4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Green #073B4C ΔE 0.010
- Dark Blue Grey #1F3B4D ΔE 0.011
- Prussian Blue #1D3557 ΔE 0.031
- Gunmetal #293241 ΔE 0.039
- Charcoal #264653 ΔE 0.040
- Onyx #343A40 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.045
- Space Cadet #2B2D42 ΔE 0.052
Use #133C4F 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.