#133C53
Closest named color: Dark Blue Grey (#1F3B4D). oklch(33.9% 0.06 237.1), rgb(19, 60, 83).
Aa
White text reads best on this color (11.67:1).
About this color
#133C53 is a dark, muted blue. In OKLCH its lightness is 34%, its chroma 0.060 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Blue Grey (#1F3B4D), ΔE 0.014 away. White text reads best on it, at 11.67:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | muted (0.060) |
| Temperature | cool |
| Nearest name | Dark Blue Grey (#1F3B4D) |
| Black text | 1.79:1 |
| White text | 11.67:1 |
Values
| HEX | #133C53 |
| RGB | rgb(19, 60, 83) |
| HSL | hsl(202, 63%, 20%) |
| OKLCH | oklch(33.9% 0.06 237.1) |
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 #133C53 | 11.67:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #133C53 | 1.79:1 | Fails | Lc 0.0 | Not readable |
| #133C53 text on white | 11.67:1 | AAA | Lc 96.6 | Preferred for body text |
| #133C53 text on black | 1.79:1 | 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
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CADCE8
oklch(88.5% 0.025 236.9)
-
Step 300
300
#A6C6DB
oklch(81% 0.045 236.9)
-
Step 400
400
#75A8C8
oklch(70.8% 0.072 236.7)
-
Step 500
500
#4E92BB
oklch(63.2% 0.093 237.2)
-
Step 600
600
#2D7BA7
oklch(55.5% 0.101 237.5)
-
Step 700
700
#1F688F
oklch(49.2% 0.093 237)
-
Step 800
800
#1C5574
oklch(42.8% 0.077 236.7)
-
Step 900
900 (this color)
#133C53
oklch(33.9% 0.06 237.1)
-
Step 950
950
#132937
oklch(27% 0.038 238.3)
#133C53 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) | #313C54 | 0.035 |
| Deuteranopia (no green cones) | #283653 | 0.028 |
| Tritanopia (no blue cones) | #004244 | 0.040 |
| Achromatopsia (no color) | #383838 | 0.060 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #133C53
#133C53
oklch(33.9% 0.06 237.1)
- #4F2F16
#4F2F16
oklch(33.9% 0.06 56.8)
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 #133C53, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Blue Grey #1F3B4D ΔE 0.014
- Midnight Green #073B4C ΔE 0.016
- Prussian Blue #1D3557 ΔE 0.026
- Charcoal #264653 ΔE 0.041
- Gunmetal #293241 ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.043
- Marine Blue #01386A ΔE 0.046
- Onyx #343A40 ΔE 0.048
Use #133C53 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.