#2372A7
Closest named color: Flat Blue (#3C73A8). oklch(53.1% 0.112 243), rgb(35, 114, 167).
Aa
White text reads best on this color (5.20:1).
About this color
#2372A7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 53%, its chroma 0.112 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Flat Blue (#3C73A8), ΔE 0.019 away. White text reads best on it, at 5.20:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Flat Blue (#3C73A8) |
| Black text | 4.03:1 |
| White text | 5.20:1 |
Values
| HEX | #2372A7 |
| RGB | rgb(35, 114, 167) |
| HSL | hsl(204, 65%, 40%) |
| OKLCH | oklch(53.1% 0.112 243) |
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 #2372A7 | 5.20:1 | AA | Lc -80.8 | Fine for body text |
| Black text on #2372A7 | 4.03:1 | AA large text | Lc 28.6 | Dividers and decoration only |
| #2372A7 text on white | 5.20:1 | AA | Lc 75.4 | Fine for body text |
| #2372A7 text on black | 4.03:1 | AA large text | Lc -26.3 | Dividers and decoration only |
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 600.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A5C5DF
oklch(80.9% 0.05 242.9)
-
Step 400
400
#74A7CF
oklch(70.8% 0.08 242.8)
-
Step 500
500
#4D90C3
oklch(63.1% 0.103 243.5)
-
Step 600
600 (this color)
#2372A7
oklch(53.1% 0.112 243)
-
Step 700
700
#1E6696
oklch(49% 0.103 242.9)
-
Step 800
800
#1C537A
oklch(42.6% 0.086 243.6)
-
Step 900
900
#1D4562
oklch(37.6% 0.067 242.9)
-
Step 950
950
#12293A
oklch(27.1% 0.043 242.6)
#2372A7 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) | #5973A9 | 0.051 |
| Deuteranopia (no green cones) | #4767A6 | 0.040 |
| Tritanopia (no blue cones) | #007F85 | 0.077 |
| Achromatopsia (no color) | #6D6D6D | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2372A7
#2372A7
oklch(53.1% 0.112 243)
- #985B17
#985B17
oklch(52.9% 0.111 62.7)
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 #2372A7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Flat Blue #3C73A8 ΔE 0.019
- Muted Blue #3B719F ΔE 0.020
- Ocean Blue #03719C ΔE 0.022
- Nice Blue #107AB0 ΔE 0.024
- Mid Blue #276AB3 ΔE 0.033
- French Blue #436BAD ΔE 0.033
- Sea Blue #047495 ΔE 0.034
- Dull Blue #49759C ΔE 0.038
Use #2372A7 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.